You have probably seen the statistic: 100 companies are responsible for 71% of global greenhouse gas emissions. It is one of the most shared climate facts on the internet, and it is doing real damage to the cause it claims to serve. Not because it is wrong, but because of what people do with it. They share it, feel absolved, and move on.

Here is what the statistic actually says. The Carbon Majors Report, published by CDP and the Climate Accountability Institute in 2017, traced industrial greenhouse gas emissions back to the companies that extracted the fossil fuels. But roughly 90% of those attributed emissions are Scope 3: the combustion of sold products by end users [1] . That means you and me, burning fossil fuel in our cars, heating our homes with gas, and buying goods shipped on container vessels. The 71% figure does not describe a crime committed by 100 CEOs in a boardroom. It describes what happens when billions of people consume what those companies sell. When you trace emissions to final consumption using trade-linked accounting, approximately 72% of global greenhouse gas emissions are driven by household demand for transport, food, housing, and goods [2] [3] .

None of this lets corporations off the hook. They have spent extraordinary sums keeping us locked in. In the United States, fossil fuel interests outspent environmental advocates 10 to 1 on climate lobbying between 2000 and 2016 [15] . BP spent $200 million on its “Beyond Petroleum” campaign, which, among other things, popularized the concept of the personal carbon footprint as a deliberate strategy to shift responsibility downstream. The system is one of mutual reinforcement. Corporations supply, lobby, and entrench. Consumers demand, accept, and look away. Blaming only one side is comfortable. It is also a dead end.

The cheapest code ships the most bugs

If you work in software, you know technical debt. You skip the tests, you hardcode the values, and you copy-paste instead of abstracting. It works today. It ships on time. And then, six months later, every new feature takes three times as long because the codebase is fighting you. The cost was never avoided. It was deferred, with interest. Eventually it might be tempting to sunset the codebase and start from scratch – we are stuck on this here planet though.

Fossil fuels are the most successful debt in human history. They work. They are abundant. Not only that, but they are, at point of sale, spectacularly cheap. But that price is a lie. The IMF calculated that global fossil fuel subsidies reached $7 trillion in 2022, equivalent to 7.1% of global GDP [4] . Only 18% of that figure consists of direct government payments. The remaining 82% are implicit subsidies: the unpriced costs of air pollution, climate damage, and other externalities. That is the gap between what we pay at the pump and what the atmosphere charges us later.

The interest on this debt is not abstract. The Lancet Countdown documented 2.52 million deaths annually from fossil fuel-derived outdoor air pollution alone [10] . UNEP’s 2025 Adaptation Gap Report found that developing countries need $310 to $365 billion per year for climate adaptation by 2035 but currently receive just $26 billion, a 12-to-1 shortfall [9] . Like any debt, the longer you let it compound, the more painful the repayment. And like technical debt, the people who took on the shortcuts are rarely the ones stuck maintaining the system.

What actually works, and what merely feels like it does

The gap between what people think helps and what the data shows is enormous. Wynes and Nicholas, in a 2017 meta-analysis published in Environmental Research Letters, ranked individual climate actions by their annual emissions impact in developed countries [5] :

• Living without an ICE car saves around 2.4 tons of CO₂-equivalent per year.
• Avoiding one long-haul return flight saves 1.6 tons.
• Switching to renewable energy saves 1.5 tons.
• A plant-based diet saves about 0.8 tons since animal products provide only 18% of globally consumed calories while generating roughly 56 to 58% of food-related emissions [6] [14] .
• Comprehensive household recycling, the action most commonly promoted by governments and schools, saves 0.21 tons. That is one-eleventh of going car-free.

xychart-beta
    x-axis ["Car-free", "Skip flight", "Renewables", "Plant-based", "Recycling"]
    y-axis "Tons CO₂e / year" 0 --> 3
    bar [2.4, 1.6, 1.5, 0.8, 0.21]

This does not mean recycling is pointless. It means the hierarchy matters. If you cannot give up your car, can you take public transport a couple of times a week? If a fully plant-based diet feels unsustainable, can you cut or reduce beef and dairy consumption at least – the worst offenders? If your landlord controls the heating system, can you push for a heat pump at the next building meeting? Switching to one can cut household heating emissions by 2.5 to 4.4 tons per year [13] . The point is not perfection. The point is that you allocate your effort where it actually counts, instead of sorting your plastics into five bins and calling it a day.

The signal you send when you spend

Individual choices matter beyond their direct emissions impact because they are, collectively, market signals. Global electric vehicle sales went from roughly 1% of new car sales in 2017 to about 22% in 2024 [8] . That demand redirected tens of billions in corporate investment and collapsed battery costs by nearly 90% over the past 15 years [16] . The global plant-based food market has more than doubled since 2017, forcing major food conglomerates like Danone, Nestlé, and Unilever to diversify into alternatives they had no interest in a few years earlier. Markets respond to what people buy. Slowly, imperfectly, but measurably.

The one action that dwarfs all others

Here is the number that should reframe this entire debate. Researchers calculated that in the 2019 Canadian federal election, the median climate impact attributable to a voter who selected a winning candidate with a strong climate platform was 34.2 tons of CO₂-equivalent, roughly 14 times the annual savings from going car-free [7] . Voting for candidates and parties with credible climate platforms is, by a wide margin, the single most impactful thing most people can do.

The evidence for policy as the highest-leverage climate tool is not speculative. The EU Emissions Trading System cut covered-sector emissions by 47% between 2005 and 2023. Australia’s 2022 election swept in a government pledging 43% emissions cuts, driven by a public of which 80% wanted greater climate action. The September 2019 global climate strikes drew over 6 million participants across 150 countries, contributing to dozens of cities declaring climate emergencies and, in Germany, a constitutional court ruling that existing climate legislation was insufficient. Elections have consequences and democracy works.

If you do nothing else, vote. If you feel powerless against the fossil fuel or animal product industry’s lobbying budget, remember that they spend that money precisely because public opinion and elections are the one force they cannot buy outright but only by influencing us enough.

What we lose if we do not act

The debt metaphor has a limit, because debt implies you can always pay it back eventually. Some of what is at stake is not recoverable on any timescale that matters to you and me.

The Global Tipping Points Report 2025, authored by over 160 scientists across 23 countries, concluded that the planet has already crossed its first climate tipping point [12] : warm-water coral reefs, on which nearly a billion people and a quarter of all marine life depend, are dying at the current 1.4 °C of warming. Their estimated threshold was 1.2 °C. We passed it. At 1.5 °C, there is a 99% probability that low-latitude reefs collapse entirely. Most would not recover unless temperatures fell back below 1 °C, a scenario no credible projection currently forecasts.

Beyond corals, the report warns that the Greenland ice sheet may begin an irreversible collapse between 1.5 and 2.7 °C of warming. If it goes, it raises global sea levels by approximately 7 meters. Not next year, but within the lifetime of our children. The AMOC, the Atlantic current system that keeps northwestern Europe temperate and monsoon seasons predictable across Asia and Africa, could fail at less than 2 °C. And these systems interact: Greenland melt weakens the AMOC, which destabilizes the Amazon, which releases more carbon, which accelerates everything else.

The IPCC AR6 projects that at 2 °C of warming, 411 million additional urban residents face severe water scarcity from drought [11] . The risk of simultaneous maize crop failure across major producing regions rises from 6% to 54%. With every additional degree, flood displacement risk increases by roughly 50%. At 3 °C, the world loses up to 18% of GDP. Under current policies, we are tracking toward 2.6 to 2.8 °C by century’s end. This is not a problem for your grandchildren. It is a concern for your retirement, your mortgage, and your children’s ability to live on this planet as you and your parents could.

Closing the tab

The framing of “corporations versus individuals” is a false binary that serves the people who benefit from inaction. The reality is a feedback loop. We consume their products. We vote for, or abstain from voting against, the policies that subsidize them. They lobby to keep us consuming and to keep those subsidies flowing. Breaking the loop requires pressure from both directions simultaneously: changing what you buy, changing what you tolerate, and changing who governs.

The $7 trillion in annual unpriced fossil fuel costs is not someone else’s debt. It is ours. We took it on with every tank of gasoline priced below its true cost, every flight cheaper than it has any right to be, and every plastic-wrapped convenience that assumes the ocean is an infinite sink. The bill does not disappear because we did not read it. It compounds.

But here is the thing about collective problems: they also have collective solutions. The EU ETS did not happen because one person recycled harder. It happened because enough people voted, campaigned, and demanded it. EV battery costs did not fall 90% over 15 years because of one enthusiast. They fell because millions of purchasing decisions created a market that made investment inevitable for capitalists.

We built this system together, over generations, often without understanding the cost. Most people on this beautiful planet are simply ill-educated about this topic. Working our way out of it will take the same thing: sustained effort from plenty of people over time. Not perfection from a few, but consistent pressure from many. Every ton of CO₂ avoided is a ton that does not compound. Every fraction of a degree we hold back is a tipping point we might not cross.

Start where you are today. Do what is within reach. Increase your efforts slowly. And above all: Keep at it!