Climate mitigation is any action that reduces greenhouse gas emissions or removes greenhouse gases from the atmosphere to limit how much the planet warms. The Intergovernmental Panel on Climate Change formally defines it as “a human intervention to reduce emissions or enhance the sinks of greenhouse gases.” In practical terms, it covers everything from replacing coal plants with solar farms to restoring forests that absorb carbon dioxide. It is one of two main strategies for dealing with climate change, the other being adaptation, which focuses on adjusting to the effects already underway.
How Mitigation Differs From Adaptation
Mitigation attacks the root cause of climate change: the buildup of heat-trapping gases in the atmosphere. Adaptation, by contrast, addresses the consequences. Building a sea wall to protect a coastal city from rising water is adaptation. Switching that city’s power grid to wind energy so less carbon enters the atmosphere is mitigation. Both are necessary because even if emissions stopped tomorrow, the warming already locked in would continue reshaping weather patterns and raising sea levels for centuries.
The two strategies reinforce each other. The more successful mitigation is at slowing warming, the less extreme (and expensive) adaptation needs to be. But because some degree of climate change is now unavoidable, no amount of mitigation eliminates the need to adapt.
Reducing Emissions by Sector
Most mitigation efforts target the sectors responsible for the largest share of global emissions: energy production, industry, transportation, and agriculture. Each requires a different set of solutions.
Energy: Electricity and heat generation remain the single largest source of emissions worldwide. The core strategy here is replacing fossil fuels with renewables. In 2024, renewables accounted for about 32% of global electricity generation. The International Energy Agency projects that share will rise to 43% by 2030. At COP28 in 2023, nearly 200 countries agreed to triple global renewable energy capacity by 2030, though an ambition gap and implementation challenges continue to slow progress.
Transportation: Electrifying cars, trucks, buses, and eventually ships and planes replaces tailpipe emissions with electricity that can come from clean sources. The shift is well underway for passenger vehicles but much earlier-stage for heavy freight and aviation.
Industry: Factories and manufacturing processes consume enormous amounts of energy and often release greenhouse gases as chemical byproducts. Improving energy efficiency, switching to electric heating, and redesigning industrial processes (particularly for steel and cement) are the primary levers.
Agriculture: Farming produces carbon dioxide, methane, and nitrous oxide through livestock digestion, rice paddies, synthetic fertilizers, and land clearing. Regenerative practices like cover cropping, no-till farming, and replacing chemical fertilizers with organic alternatives can turn soil into a carbon sink rather than a source. Research across 345 measurements of regenerative practices found that approaches like no-till farming and legume cover cropping stored roughly half a ton of carbon per hectare per year on average.
Why Methane Gets Special Attention
Carbon dioxide gets most of the headlines, but methane is a far more potent greenhouse gas over short time frames. It traps much more heat per molecule, yet it breaks down in the atmosphere within about a decade. That means cutting methane delivers a cooling effect relatively quickly, buying time while the world works on longer-term CO₂ reductions.
Over 100 countries have joined the Global Methane Pledge, committing to collectively reduce methane emissions by at least 30% below 2020 levels by 2030. Meeting that target would have a climate impact comparable to the entire global transport sector switching to net-zero technologies. Sharp methane cuts in the next few years could help keep the 1.5°C temperature target within reach.
Removing Carbon Already in the Atmosphere
Cutting emissions is the priority, but it is not enough on its own. Some carbon dioxide will need to be actively pulled back out of the atmosphere, a process called carbon removal. There are two broad approaches: nature-based and technological.
Nature-Based Solutions
Forests, wetlands, mangroves, and peatlands naturally absorb carbon dioxide. Protecting and restoring these ecosystems is one of the most cost-effective forms of mitigation available. The United Nations Environment Programme estimates that nature-based solutions could cut net emissions by up to 18 gigatons of carbon dioxide per year by 2050. Forests alone account for roughly two-thirds of that potential, which is why reforestation and halting deforestation are central to nearly every national climate plan.
Direct Air Capture
Technology can also pull CO₂ directly from the air. Direct air capture (DAC) systems work by passing air over chemical solutions or solid materials that bind to carbon dioxide molecules. The captured CO₂ is then separated, compressed, and either stored underground permanently or used in industrial processes. The technology is proven, but because CO₂ in ambient air is roughly 300 times more dilute than in the exhaust of a coal plant, the process is energy-intensive and expensive. Current global DAC capacity is tiny compared to what climate models say will eventually be needed, though several large-scale facilities are under construction.
The Global Targets
The Paris Agreement, signed in 2015, set the overarching framework: hold the increase in global average temperature to well below 2°C above pre-industrial levels, with a stretch goal of limiting warming to 1.5°C. In recent years, the 1.5°C target has become the primary benchmark. To stay on track for it, greenhouse gas emissions needed to peak before 2025 and must decline 43% by 2030.
Those numbers define the scale of the mitigation challenge. Every fraction of a degree matters because warming compounds its own effects. The difference between 1.5°C and 2°C translates into significantly more extreme heat events, greater sea level rise, and more severe damage to coral reefs and food systems.
The Economics of Acting vs. Not Acting
A common concern is whether mitigation is affordable. Recent economic modeling puts the total investment required to address climate change at 1% to 2% of cumulative global economic output through 2100. That is a large number in absolute terms, but it is far smaller than the alternative. The net cost of inaction, after accounting for the investment needed for both mitigation and adaptation, runs between 11% and 27% of cumulative economic output over the same period. In other words, every dollar spent on mitigation now avoids roughly five to fifteen dollars in climate damage later. The economic case for aggressive mitigation is not a close call.