What is *How Bad Are Bananas?* by Mike Berners-Lee about?

*How Bad Are Bananas?* analyzes the carbon footprint of everyday items and activities, from text messages to international flights, using CO₂e (carbon dioxide equivalent) measurements. Berners-Lee combines scientific rigor with accessible explanations, offering actionable insights to reduce environmental impact. The book’s 100+ entries, like comparing bananas (low footprint due to boat transport) vs. roses (high due to refrigeration), help readers prioritize climate-friendly choices.

Who should read *How Bad Are Bananas?*?

Environmentally conscious individuals, policymakers, and businesses seeking data-driven sustainability strategies will benefit. It’s ideal for readers wanting to demystify carbon footprints without technical jargon. The book’s humor and bite-sized sections also appeal to casual learners. Bill Bryson praised it as “fascinating, useful, and enjoyable,” making it accessible to broad audiences.

Is *How Bad Are Bananas?* worth reading in 2025?

Yes—the 2020 updated edition includes modern examples (e.g., Zoom calls at ~10g CO₂e) and reflects urgent climate realities. Its framework for estimating footprints remains relevant, helping readers adapt to new sustainability challenges. The book’s blend of practicality and wit ensures enduring value for personal and professional carbon literacy.

How does *How Bad Are Bananas?* calculate carbon footprints?

Berners-Lee uses life-cycle analysis, factoring production, transport, usage, and disposal. For example, bananas emit ~80g CO₂e due to efficient shipping, while asparagus air-freighted off-season can reach 3.5kg CO₂e. The book emphasizes “orders of magnitude” over precision, helping readers avoid carbon-intensive outliers.

What are the key takeaways from *How Bad Are Bananas?*?

1. **Prioritize high-impact actions**: Flying (1 ton CO₂e/hour) dwarfs bananas. 2. **Transport matters**: Boat-shipped goods beat air-freighted. 3. **Beware of invisible factors**: Refrigeration, packaging, and waste often outweigh the item itself. 4. **Context is key**: A newspaper (350g CO₂e) has a larger footprint than a smartphone search.

How accurate are the carbon footprint estimates in the book?

Berners-Lee acknowledges estimates rely on available data and simplifying assumptions. For example, a loaf of bread (1kg CO₂e) varies by production methods. The goal is to highlight relative impacts (e.g., dairy vs. plant-based milk) rather than exact figures, enabling informed trade-offs.

What surprising items have high carbon footprints in *How Bad Are Bananas?*?

- **A single rose**: 25kg CO₂e when grown in heated greenhouses and flown. - **Laundry**: Hot washes and tumble-drying contribute ~1.3kg CO₂e per load. - **Data centers**: A Google search emits ~0.2g CO₂e, but global internet use adds up.

How does *How Bad Are Bananas?* approach solutions to climate change?

It advocates systemic changes (e.g., renewable energy grids) alongside individual choices (e.g., reducing meat consumption). Berners-Lee stresses that personal actions matter most when scaled collectively, like opting for train travel over short flights.

バナナはどのくらい地球に悪いのか：炭素足跡のカタログ

あらゆるもののカーボンフットプリント

マイク・バーナーズ＝リー

3.91(2880 Reviews)

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の概要

お使いのバナナが気候変動の悪役かもしれないと考えたことはありますか？マイク・バーナーズ＝リーのベストセラーは、あらゆるものの炭素足跡（カーボンフットプリント）を解読し、驚くべき比較で私たちの思い込みに挑戦します。複雑な気候データを分かりやすく解説していると称賛されるこの愉快なガイドブックは、日常の選択に対するあなたの見方を永遠に変えてしまうでしょう。

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1冊の本。さまざまな聴き方。

バナナはどのくらい地球に悪いのか：炭素足跡のカタログの同じアイデアを、あなたに合う声・深さ・ペースで学べます。いつでも切り替えられます。

第1章

Carbon Instinct: Navigating Our Climate Impact One Decision at a Time

Have you ever stood in a supermarket aisle, paralyzed by an impossible question: Are bananas bad for the planet? This seemingly simple query stumped environmental consultant Mike Berners-Lee when a journalist asked him to tour a grocery store and identify climate-friendly foods. The encounter sparked a mission to create this groundbreaking carbon footprint guide that has since become required reading in sustainability circles and a favorite of climate-conscious celebrities like Leonardo DiCaprio. Unlike typical environmental manifestos that leave readers feeling guilty or overwhelmed, Berners-Lee's approach is refreshingly practical and even playful. His central premise is both elegant and urgent: we cannot manage what we don't understand. Just as we develop an intuition for financial costs, we need a "carbon instinct" to navigate our climate choices-from text messages to transatlantic flights, from bananas (which are actually quite good) to burgers (not so much). The book arrives at a critical moment when climate awareness has never been higher, yet practical guidance remains scarce. What follows is your roadmap to developing that essential carbon instinct.

第2章

Understanding Carbon Footprints: The Essential But Impossible Measure

Carbon footprint is a lovely phrase that's horribly abused. Throughout environmental discourse, it's often reduced to a fraction of its true meaning-what Berners-Lee calls a "carbon toe-print." The genuine carbon footprint represents the total climate impact of something, including all greenhouse gases converted to carbon dioxide equivalent (CO2e). While carbon dioxide dominates at 85% of human climate impact, methane (8%), nitrous oxide (5%), and refrigerant gases (2%) contribute significantly despite their smaller volumes because of their greater warming potential. The most common mistake in carbon accounting is missing indirect emissions. A plastic toy's footprint includes not just manufacturing and transportation but also oil extraction and processing. Similarly, driving includes not only tailpipe emissions but also the carbon from producing the car and refining the fuel. Aviation emissions carry additional impact-they're multiplied by 1.9 to account for their greater warming effect at high altitudes, though some experts suggest this multiplier could be as high as 4. Carbon footprints are simultaneously essential and impossible to measure perfectly. Many organizations respond by measuring something easier but less meaningful-like an airport focusing on building efficiency while ignoring flights. This book instead attempts to understand the whole picture, making reasonable estimates despite uncertainties. The numbers provided aren't precise-a burger's 2.5kg CO2e footprint might actually be between 1.5 and 4kg-but they're accurate enough to distinguish significant impacts (flying) from negligible ones (hand-drying). To make these abstract figures tangible, imagine a ton of CO2e as two 60-gallon garden water tanks filled with gasoline and set ablaze. The average North American generates about 28 tons annually, while the global average is 7 tons. Throughout the book, Berners-Lee uses a 10-ton lifestyle as a reference point-not because it's sustainable (globally it would increase emissions by 40%), but because it's achievable for most people. For North Americans, this means a 65% reduction; for Europeans, about one-third below national averages. The human cost of these emissions is sobering. Berners-Lee's rough calculations suggest about 150 tons CO2e corresponds to one climate change-related death. At this rate, an average American lifestyle would cause one death somewhere in the world every 5 years. Yet carbon is dramatically undervalued in economic terms-at current market rates of $18 per ton, this values a human life at just $2,700.

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『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の一語一語が音声に合わせてリアルタイムでハイライトされ、自然に読み進められます。

第3章

The Surprising Carbon Impact of Everyday Actions

The smallest carbon footprints often come from activities we perform daily without a second thought. A text message generates just 0.014g CO2e-globally, 2.5 trillion texts create only 32,000 tons CO2e annually, a mere one ten-thousandth of a percent of the world's carbon footprint. A cup of tap water produces a minuscule 0.06g CO2e, though pouring it down the drain quadruples this to 0.25g because wastewater treatment is more carbon-intensive than supply. Flushing adds even more, bringing the total to 4g CO2e. Digital activities have surprisingly small footprints: a web search generates between 0.7g and 4.5g CO2e, with Google's servers accounting for just 0.2g. The rest comes from your device, network infrastructure, and the embodied carbon in manufacturing all equipment. Emails vary from 0.3g CO2e for spam to 50g for those with lengthy attachments. Despite their small individual impact, these digital activities add up-a typical business user's annual incoming mail generates 135kg CO2e, equivalent to driving 200 miles. Even mundane actions like using doors have measurable impacts: zero for a household door on a summer day, 3g CO2e for a front door on a cold winter day, and 84g for electric doors opening into a large heated stairwell. The electric motors themselves use minimal energy (1g CO2e); the real impact comes from heat loss through large openings. Hand-drying methods vary dramatically: zero for air-drying, 3g CO2e for the efficient Dyson Airblade, 10g for a single paper towel, and 20g for conventional heated hand dryers. For someone using public toilets six times daily, this adds up to around 15kg CO2e annually-equivalent to consuming 1kg of beef. Perhaps most surprising is the plastic shopping bag debate. Standard supermarket bags generate just 10g CO2e-using five weekly contributes only 2.5kg CO2e annually, about the same as one cheeseburger. The bag typically represents just one-thousandth of the carbon footprint of the food it contains. Paper bags, counterintuitively, have a higher carbon footprint-12g CO2e for lightweight recycled versions and up to 80g for elaborate virgin paper bags-because paper production is highly energy-intensive and the bags must be heavier to function properly.

第4章

Food Choices: The Unexpected Climate Heroes and Villains

Food represents one of our most impactful daily climate decisions, with enormous variation between different items. Fruits like bananas (80g CO2e), apples (up to 150g CO2e), and oranges (up to 90g CO2e) are climate heroes. Bananas are particularly impressive, providing excellent nutrition (140 calories plus vitamins and potassium) with minimal carbon impact for three reasons: they grow in natural sunlight without hot-housing, transport well by boat rather than planes, and come with natural packaging. Vegetables show even more dramatic variation. Carrots are among the most climate-friendly foods available at just 0.3kg CO2e per kilo, while tomatoes demonstrate the most extreme range-from just 0.4kg CO2e for local, seasonal varieties to a staggering 50kg CO2e for out-of-season greenhouse tomatoes grown in cold climates. At their worst, tomatoes become the highest-carbon food in the book! Similarly, asparagus varies from 125g CO2e per 250g pack when locally grown to 3.5kg CO2e when air-freighted from Peru to the UK. Animal products consistently rank as climate-intensive foods. A 4-ounce beefsteak generates 2kg CO2e-equivalent to driving 1.4 miles or eating 25 bananas. Beef's hefty 18kg CO2e per kilogram footprint comes primarily (90%) from farming itself. Cows are doubly problematic: they convert feed to food inefficiently, and their rumination produces methane that doubles their climate impact. A cheeseburger generates 2.5kg CO2e, compared to just 1kg for a veggie burger, with the beef (1.9kg) and cheese (250g) as the main culprits. Speaking of cheese, at 12kg CO2e per kilogram, hard cheese has a carbon footprint higher than many meats. It takes about 10 quarts of milk to produce 1kg of hard cheese, making it a climate-intensive food choice. Going vegetarian won't reduce your impact if you simply swap meat for cheese. Even beverages vary significantly. Black tea or coffee boiled efficiently produces just 23g CO2e, while adding milk nearly triples this to 55g CO2e. Large coffee shop drinks create substantial emissions: 236g CO2e for a cappuccino and 343g CO2e for a latte. For alcoholic options, locally brewed cask ale generates just 300g CO2e per pint, while extensively transported bottled beer can reach 900g CO2e. Wine averages 1,040g CO2e per bottle, with one-third from production, one-third from the glass bottle, and the rest from transport and retail. The carbon footprint of food breaks down in surprising ways. Two-thirds occurs on farms, with transport significant for some products but not most. Unlike the broader carbon picture where CO2 dominates, agricultural emissions consist primarily of nitrous oxide (53%) from fertilizers and methane (36%) from livestock. To reduce your food carbon footprint: eliminate waste (25% savings), reduce meat and dairy consumption (25% savings), choose seasonal produce (10% savings), and use energy-efficient cooking methods (5%). Combined properly, these approaches can reduce your food carbon footprint by approximately 60%.

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』をもっと深く楽しむ

毎日の新しい気づきを10万件以上のレッスンから
言葉をハイライトして音声と同期
ライブラリを保存して、どの端末からでも利用

第5章

Home Energy: The Power of Efficiency

Home energy use represents one of our largest carbon impacts-and one of our greatest opportunities for reduction. The carbon footprint of heating varies dramatically by source: solar water heating produces just 50g CO2e per kilowatt-hour (accounting only for panel manufacturing), while a modern 90%-efficient gas furnace generates 244g CO2e. Less efficient methods create substantially higher emissions: old 55%-efficient gas furnaces produce 400g CO2e, US grid electricity generates 660g CO2e, and Australian grid electricity creates 1,060g CO2e per unit. Electricity's carbon footprint varies dramatically by country: Iceland's geothermal and hydropower grid produces just 60g CO2e per kilowatt-hour, while coal-dependent Australia generates 1,060g CO2e. Between these extremes lie Canada (220g), the UK (600g), the US (660g), and China (900g). However, when you use additional electricity, you're typically triggering additional fossil fuel use, meaning each marginal unit consumed has a footprint of at least 1kg CO2e regardless of location. "Green" electricity tariffs often mislead consumers. In the UK, suppliers claiming to provide "renewable" electricity often simply sell their Renewable Obligation Certificates to other providers, allowing those companies to use less renewable energy-resulting in zero net carbon benefit. The only reliable way to reduce your electricity footprint is to consume less. Simple home improvements can yield dramatic carbon savings. Adding 270mm (10 inches) of insulation to a previously uninsulated three-bedroom house costs about 350kg CO2e but saves approximately 880kg CO2e annually-yielding a remarkable 35-ton carbon saving over 40 years. The embodied carbon of the insulation pays back in under six months, while the $750 investment typically pays for itself within 4 years. Everyday activities like showering have widely varying impacts. A 3-minute shower using an efficient gas furnace and aerated showerhead produces just 90g CO2e, while a typical 6-minute electric shower generates 550g CO2e, and a 15-minute high-volume electric shower creates a substantial 1.9kg CO2e. For a family of four with high-carbon shower habits, switching to aerated showerheads, gas heating, and shorter shower times could save up to 2 tons of CO2e annually-equivalent to a return flight from San Francisco to Vancouver. Even lighting choices matter significantly. A low-energy bulb left on for a year produces 90kg CO2e, while an old-fashioned 100-watt incandescent bulb generates a whopping 500kg CO2e. Despite efficiency improvements from low-energy bulbs, we often compensate by using more lighting or spending savings elsewhere (the rebound effect).

第6章

Transportation: The Miles That Matter

Transportation represents one of our most visible carbon impacts, with dramatic variation based on mode and efficiency. A five-mile congested commute each way generates about 22kg CO2e daily in an average car-that's 4.8 tons annually, more than a return flight from Los Angeles to Barcelona. Traffic jams roughly double your fuel consumption per mile, but you also force others to idle longer, effectively tripling the emissions you might expect. The carbon footprint of driving varies dramatically: a well-maintained Fiat 500 at steady highway speeds produces 350g CO2e per mile, an average US car achieving 22.4mpg generates 850g CO2e, while a poorly maintained luxury SUV driving at high speed creates 2,500g CO2e. With four people in an efficient car, emissions drop to just 86g per person-mile. About half of driving emissions come from the exhaust pipe, with roughly 40% from vehicle manufacturing and maintenance, and a few percent from fuel production and distribution. Public transportation generally offers significant carbon savings. Bus efficiency correlates directly with passenger numbers and driving conditions, generating about 150g CO2e per passenger-mile in developed countries. Train travel produces moderate carbon emissions: 150g CO2e per mile for intercity standard class, 160g CO2e for London Underground, 190g CO2e for light rail/trams, and 300g CO2e for intercity first class. These figures include direct emissions, electricity use, train manufacturing, and infrastructure maintenance. Flying represents one of our highest-carbon activities. A round-trip flight from Los Angeles to Barcelona generates 4.6 tons CO2e (average class), 3.4 tons economy, or a whopping 13.5 tons first class-equivalent to 340,000 plastic carrier bags or three months to a full year of 10-ton living. Each Boeing 747 burns 116 tons of fuel per leg, with high-altitude emissions causing 1.9 times more climate impact than ground-level equivalents. The most climate-friendly transportation option remains cycling, though even this varies based on what fuels the cyclist: 65g CO2e per mile when powered by bananas, 90g with cereal and milk, 200g with bacon, 260g with cheeseburgers, and a staggering 2,800g with air-freighted asparagus. Despite these emissions, cycling remains about 10 times more carbon-efficient than even the most efficient cars when powered by low-carbon foods.

聴きながら、すべての言葉を目で追えます

第7章

Consumer Goods: The Hidden Carbon in Everything We Own

The things we buy carry substantial carbon footprints that often remain invisible to consumers, embedded in complex global supply chains and manufacturing processes. Electronic devices particularly exemplify this hidden impact. A computer's carbon footprint comes from both manufacturing and usage phases, with the manufacturing phase often being surprisingly dominant. A 21.5-inch iMac generates about 720kg CO2e before even being switched on-equivalent to a Glasgow-Madrid return flight or driving 1,800 miles in an average car. This footprint isn't primarily from raw materials but from energy-intensive microprocessor production, with a single 2g chip generating around 5kg CO2e due to the ultra-pure materials and precise manufacturing conditions required. In operation, the iMac consumes 105 watts, generating emissions that equal manufacturing impacts after 11,500 hours of use in the UK, or roughly four years of typical use. Clothing's carbon impact varies widely based on materials, production methods, and care requirements. Synthetic pants have a significantly lower carbon footprint than natural cotton jeans, challenging common assumptions about "natural" being better. Cotton jeans generate about 6kg CO2e in production alone, equivalent to an 8-mile car drive, requiring 7,000 liters of water and intensive agricultural processes. Their lifetime impact is dominated by washing and drying-about four times the production footprint, reaching approximately 24kg CO2e over their lifespan. Meanwhile, nylon travel pants (3kg CO2e to produce) last three times longer and dry much faster, making their per-wear carbon impact just one-tenth of the jeans. This demonstrates how durability and care requirements can outweigh initial production emissions. Footwear presents a wide spectrum of carbon impacts, varying by materials, manufacturing processes, and longevity. Simple, durable Crocs made from expanded EVA generate just 1.5kg CO2e, while synthetic shoes produce 8kg CO2e, an average pair creates 11.5kg CO2e, and all-leather footwear tops the list at 15kg CO2e. For synthetic shoes made in China, the carbon footprint breaks down specifically: about half comes from materials production, a quarter from manufacturing energy, 15% from global transport, 5% from packaging materials and disposal, and 5% from miscellaneous sources including retail operations. The publishing industry also contributes to carbon emissions in surprising ways. A typical paperback generates about 1kg CO2e-equivalent to watching 12 hours of TV-but varies significantly based on production choices. Books printed on recycled paper with high sales efficiency generate around 400g CO2e, while those using virgin paper with higher waste rates can reach 2kg CO2e. E-readers present an interesting comparison, with a hefty 50kg initial carbon footprint, requiring readers to finish about 100 paperbacks before offsetting their production emissions, not counting ongoing electricity consumption. Financial services generate significant but often overlooked emissions through their operational infrastructure. A $150,000 mortgage at 5% interest generates approximately 800kg CO2e annually-equivalent to a month of 10-ton living. This seemingly invisible footprint stems from the financial services industry's extensive operations: office buildings, computer systems, postal communications, data storage centers, business travel, and outsourced services. Input-output modeling reveals that financial services generate about 106g CO2e per dollar spent, making them a substantial contributor to individual carbon footprints through everyday banking and investment activities.

第8章

The Bigger Picture: Global Carbon Impacts

While individual actions matter, understanding the scale of global carbon impacts provides essential context. Global greenhouse gas emissions total approximately 50 billion tons CO2e annually, according to the IPCC's 2007 assessment. Carbon dioxide from fossil fuels dominates at 57%, with methane contributing 14% (from agriculture, fossil fuel extraction, and landfills), and nitrous oxide at 8% (primarily from fertilizers). The remaining 21% comes from various sources including industrial processes, refrigerants, and land use changes. These emissions have been increasing at an average rate of 2.5% per year over the past decade. Our proven fossil fuel reserves contain approximately 2.5 trillion tons CO2e-equivalent to 50 years of current global emissions. This includes roughly 1 trillion tons from coal, 900 billion tons from oil, and 600 billion tons from natural gas. Even this conservative estimate would allow us to continue emitting carbon at current rates until roughly the end of the century. The uncomfortable reality is that it's difficult to imagine countries and businesses willingly leaving these valuable assets, worth an estimated $27 trillion, in the ground. Major oil companies continue to invest hundreds of billions annually in new exploration and extraction technologies. Deforestation's impact is particularly severe. Deforesting one hectare (100m x 100m) releases approximately 500 tons CO2e-equivalent to driving 700,000 miles. Globally, we're losing about 32 million acres of rainforest annually (half the UK's land area), generating 9 billion tons CO2e or 17% of all human emissions. Most clearing (22 million acres) is for agriculture: 20-25% for cattle grazing, 35-45% for small holdings, 15-20% for intensive agriculture, 10-15% for logging, and 5% for urbanization and infrastructure. The Amazon rainforest alone stores an estimated 100 billion tons of carbon - equivalent to 10 years of global emissions. Brazil, Indonesia, and the Democratic Republic of Congo account for over 60% of all tropical forest loss. Data centers have emerged as a significant and growing source of emissions. They currently generate 130 million tons CO2e annually-about 0.25% of global emissions or one-seventh of the UK's total footprint. These facilities consume massive amounts of electricity both for operation and cooling, with a single large data center using as much power as a small city of 50,000 people. By 2020, their emissions are predicted to nearly double to 250-340 million tons. The digital revolution may ultimately not be lower-carbon than the paper-based world it's replacing, partly due to the "rebound effect"-as data storage becomes cheaper and more efficient, we simply store and access vastly more information. For example, streaming one hour of video weekly generates annual emissions equivalent to driving 350 miles. Black carbon, a component of soot, may be the world's second-leading cause of global warming after CO2, contributing 7-15 billion tons CO2e annually (15-30% beyond standard emissions figures). It warms the planet both through atmospheric greenhouse effects and by darkening snow and ice surfaces, increasing heat absorption. In the Arctic, black carbon deposits have reduced snow albedo by up to 30%, accelerating melting. Unlike CO2, black carbon remains in the atmosphere only days, making its reduction through particulate filters and efficient stoves an immediate climate benefit. Major sources include diesel engines, agricultural burning, and household cooking in developing countries. Replacing traditional cookstoves with clean alternatives could reduce black carbon emissions by 25-50%.

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言葉をハイライトして音声と同期
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第9章

Making Carbon-Conscious Choices: A Path Forward

The author addresses the common question of why individuals should act when their impact seems small compared to global emissions. He argues that leadership can come from anywhere-individuals, businesses, and governments must act simultaneously rather than waiting for others. When people find ways to enjoy life with smaller carbon footprints, they set standards for others, influence businesses, and ultimately help shift political positions. Cost-benefit analysis reveals that some carbon-reduction strategies are dramatically more effective than others. The most profitable option is installing attic insulation in homes without any ($105 net profit per ton saved). Other efficient options include wind farms (payback in 15 years), reducing highway speeds (cost neutral), paying farmers to maintain forests ($4.50 per ton), and funding family planning in developing countries ($6 per ton). Less cost-effective measures include micro-wind turbines ($375 per ton) and micro-photovoltaic panels ($540 per ton). For individuals seeking to reduce their carbon footprint, Berners-Lee offers several practical strategies. For transportation: choose bikes, buses, trains, walking or ridesharing; drive steadily when necessary; merge lanes gently; maintain safe distances at slower speeds; minimize braking; and signal early to prevent others from braking unnecessarily. For home energy: insulate thoroughly, use efficient appliances, minimize heating and cooling needs, and be skeptical of "green" energy claims. For food: eliminate waste by serving appropriate portions, eating leftovers, and managing food storage properly; reduce meat and dairy consumption; choose seasonal produce avoiding hothouses and air freight; minimize excessive packaging; recycle packaging; help stores reduce waste; buy misshapen produce; and use energy-efficient cooking methods. For consumer goods: buy durable, easy-to-dry clothing; wear items until they're worn out; buy secondhand; favor synthetics over natural fibers for frequent-wash items; maintain and repair appliances rather than replacing them; and consider the embodied carbon in everything you purchase. Perhaps most importantly, Berners-Lee encourages readers to find ways of being happier with a smaller carbon footprint. This isn't about sacrifice but about recognizing that many high-carbon activities don't actually enhance our wellbeing. By focusing on what truly matters-connection, purpose, health, and experiences rather than possessions-we can simultaneously improve our lives and reduce our climate impact. As he concludes, "if you can find a way of being happier but with a smaller footprint, you are a leader."

★★★★★

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』を最後まで読み終えました

100万人以上の学習者に愛用されています

“23日間、毎日使い続けています。今では日課の一部です。”

jayallen

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の主要テーマ

carbon footprint accounting
sustainable consumer choices
indirect emission analysis
climate impact quantification
environmental decision making

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の名言

We cannot manage what we don't understand.
Carbon footprint is a lovely phrase that's horribly abused.
Missing indirect emissions is the most common mistake in carbon accounting.
Fruits like bananas are climate heroes.
At their worst, tomatoes become the highest-carbon food in the book!

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の登場人物

Mike Berners-LeeAuthor and environmental consultant

著者について

『How Bad Are Bananas? The Carbon Footprint of Everything（バナナはどれくらい悪いのか？：あらゆるもののカーボンフットプリント）』の著者であるマイク・バーナーズ＝リーは、著名なサステナビリティの専門家であり、ランカスター大学の教授として持続可能な食料システムやサプライチェーンの炭素指標を研究しています。

環境責任の先駆者である彼は、グローバル企業が気候への影響を測定し削減するのを支援するため、Small World Consultingを設立しました。彼の活動は日常の習慣とシステム的な解決策を橋渡しするものであり、それは『How Bad Are Bananas?』の中心的なテーマでもあります。同著では、一般的な製品や活動に隠された気候変動へのコストを、機知と科学的な厳密さをもって分析しています。

バーナーズ＝リーの高く評価されている著書には、21世紀のサステナビリティの課題に対する包括的なガイドである『There Is No Planet B（惑星Bはない）』や、ダンカン・クラークとの共著で世界のエネルギー政治を検証した『The Burning Question』などがあります。メディアのコメンテーターとしても頻繁に活動しており、サー・デイビッド・アッテンボローと共にBBCのドキュメンタリー『Climate Change: The Facts』などに出演しています。

ビル・ブライソンは『How Bad Are Bananas?』を「魅力的で、有用で、楽しい」と称賛しており、アップデートされた2020年版は環境意識の高い読者にとって今なお必読書となっています。また、バーナーズ＝リーはワールド・ワイド・ウェブ（WWW）の発明者であるティム・バーナーズ＝リーの弟でもあり、家族のレガシーと環境保護活動を融合させています。

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This plan bridges the gap between evolutionary biology and historical geopolitics to explain why human societies rise and fall. It is ideal for history buffs, sociologists, and strategists looking to understand the primal drivers of power and systemic collapse.

1 h 30 m•3 セクション

学習プラン

Nutrition

This comprehensive guide bridges the gap between scientific theory and practical application, making it essential for anyone looking to master their health. It is ideal for fitness enthusiasts, health-conscious individuals, or professionals seeking a holistic understanding of food psychology and performance.

6 h 4 m•5 セクション

学習プラン

Capitalism destroys humanity and society

This learning plan provides a critical framework for understanding how modern economic structures impact social stability and planetary health. It is essential for activists, students, and citizens seeking to move beyond profit-driven models toward a sustainable and equitable future.

5 h 14 m•4 セクション

学習プラン

Power, Money, and Daily Life

This learning plan is essential for anyone seeking to understand the invisible forces of governance and economics that shape our world. It is designed for curious minds and aspiring policy thinkers who want to move beyond headlines to grasp how power and capital actually function.

2 h•4 セクション

学習プラン

Minimalist Living for Peace and Health Guide

In an era of constant consumption, this guide provides a roadmap for reclaiming your time and mental energy. It is ideal for individuals feeling overwhelmed by clutter or stress who seek a sustainable balance between physical simplicity and emotional well-being.

4 h 54 m•4 セクション

学習プラン

Reconnect with how goods are made to buy less

In our convenience-driven society, we've become increasingly disconnected from how goods are produced, leading to unsustainable consumption patterns with serious environmental and social consequences. This learning plan helps anyone seeking to develop a more conscious relationship with material goods and transition from mindless consumption to intentional participation in production systems.

4 h 37 m•4 セクション

コロンビア大学卒業生がサンフランシスコで開発

LOVED BY

1,000,000+ curious minds.

4.7

avg rating

1M+ learners

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

BeFreedがウェブ上でどのように話題になっているかをもっと見る

コロンビア大学卒業生がサンフランシスコで開発

LOVED BY

1,000,000+ curious minds.

4.7

avg rating

1M+ learners

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

BeFreedがウェブ上でどのように話題になっているかをもっと見る

今すぐ学習の旅を始めよう

第7章

バナナはどのくらい地球に悪いのか：炭素足跡のカタログ

概要『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の概要

1冊の本。さまざまな聴き方。

Carbon Instinct: Navigating Our Climate Impact One Decision at a Time

Understanding Carbon Footprints: The Essential But Impossible Measure

聴きながら、すべての言葉を目で追えます

The Surprising Carbon Impact of Everyday Actions

Food Choices: The Unexpected Climate Heroes and Villains

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』をもっと深く楽しむ

Home Energy: The Power of Efficiency

Transportation: The Miles That Matter

聴きながら、すべての言葉を目で追えます

Consumer Goods: The Hidden Carbon in Everything We Own

The Bigger Picture: Global Carbon Impacts

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』をもっと深く楽しむ

Making Carbon-Conscious Choices: A Path Forward

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』を最後まで読み終えました

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の主要テーマ

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の名言

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の登場人物

著者について

バナナはどのくらい地球に悪いのか：炭素足跡のカタログの要約をダウンロード

他のユーザーのお気に入り

この本に関するよくある質問

What is How Bad Are Bananas? by Mike Berners-Lee about?

Who should read How Bad Are Bananas??

Is How Bad Are Bananas? worth reading in 2025?

How does How Bad Are Bananas? calculate carbon footprints?

この学習プランの一部

Reconnect with how goods are made to buy less

Books on production-consumption disconnect

もっと見る

1,000,000+ curious minds.

1,000,000+ curious minds.

1冊の本。さまざまな聴き方。

Carbon Instinct: Navigating Our Climate Impact One Decision at a Time

Understanding Carbon Footprints: The Essential But Impossible Measure

聴きながら、すべての言葉を目で追えます

The Surprising Carbon Impact of Everyday Actions

Food Choices: The Unexpected Climate Heroes and Villains

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』をもっと深く楽しむ

Home Energy: The Power of Efficiency

Transportation: The Miles That Matter

聴きながら、すべての言葉を目で追えます

Consumer Goods: The Hidden Carbon in Everything We Own

The Bigger Picture: Global Carbon Impacts

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』をもっと深く楽しむ

Making Carbon-Conscious Choices: A Path Forward

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』を最後まで読み終えました

他のユーザーのお気に入り

この学習プランの一部

Reconnect with how goods are made to buy less

Books on production-consumption disconnect

もっと見る

『バナナはどのくらい地球に悪いのか：炭素足跡のカタログ』の概要