Mitigating global warming requires cutting greenhouse gas emissions roughly in half by 2030 and by about 84% by 2050, compared to 2019 levels. That’s the benchmark set by climate scientists for keeping warming near 1.5°C above pre-industrial temperatures. As of 2024, the planet has already warmed about 1.3°C on a long-term basis, with annual temperatures briefly crossing the 1.5°C mark for the first time. The window is narrowing, but the tools to act exist across energy, transportation, land use, industry, and daily life.
Shifting to Renewable Energy
Burning fossil fuels for electricity and heat is the single largest source of emissions, and replacing it with clean energy is the highest-leverage change available. Renewables supplied about 30% of global electricity in 2023. The International Energy Agency projects that share will reach 46% by 2030, with wind and solar alone accounting for 30%. That growth is accelerating as costs continue to fall, but it still needs to happen faster to align with the deepest emissions cuts scientists recommend.
The transition isn’t just about building solar farms and wind turbines. It also means upgrading electrical grids to handle variable power sources, expanding battery storage, and retiring coal and gas plants earlier than their planned lifespans. Countries that pair renewable buildouts with grid modernization see the smoothest transitions. Energy supply is one area where the IPCC projects emissions could drop by more than 100% by 2050 in the most ambitious scenarios, meaning the sector would go from a net emitter to a net absorber of carbon when paired with capture technologies.
Electrifying Transportation
Cars, trucks, ships, and planes account for a major share of global emissions, and electric vehicles are the clearest near-term solution for road transport. A battery electric car produces about 73% fewer lifecycle emissions than a gasoline car when running on today’s European electricity mix. That accounts for everything: mining the battery materials, manufacturing the vehicle, and driving it over its full life. Even though producing an electric car generates roughly 40% more emissions upfront than a gasoline car, that gap is erased after about 17,000 kilometers of driving, typically within the first year or two.
When charged with renewable electricity, the advantage grows to 78% fewer emissions. Diesel cars, despite their reputation for efficiency, produce nearly identical lifecycle emissions to gasoline vehicles. Natural gas vehicles cut emissions by only about 13%. For individual choices, switching to an electric vehicle is one of the most impactful steps available, especially if your home electricity comes from clean sources.
Cutting Methane Emissions
Carbon dioxide gets most of the attention, but methane is a far more potent greenhouse gas in the short term, trapping about 80 times more heat over a 20-year period. It leaks from oil and gas operations, livestock farming, landfills, and rice paddies. The good news: methane breaks down in the atmosphere much faster than CO2, so reducing it delivers rapid cooling benefits.
More than 150 countries have signed a global pledge to cut methane emissions 30% by 2030. Progress has been uneven. The IEA estimates that policies currently on the books would reduce fossil fuel methane by about 20% from 2023 levels by the end of the decade. If every country and company followed through on its pledges fully and on time, that figure could reach 50%. Reaching the net-zero pathway would require a 75% reduction in fossil fuel methane by 2030. Practical steps include detecting and sealing leaks at well sites and pipelines, capturing landfill gas for energy, and changing livestock feeding practices to reduce digestive methane.
Protecting and Restoring Forests
Forests act as massive carbon sponges. A single tree absorbs between 10 and 48 kilograms of CO2 per year, depending on species, age, and climate. Plant 1,000 trees per hectare, and that land could capture 10 to 48 tons of CO2 annually. A reforestation project covering 100 hectares could pull 20,000 to 50,000 tons of CO2 out of the atmosphere.
These “nature-based solutions” are among the cheapest forms of carbon removal available, but they come with caveats. Young forests absorb carbon quickly; mature forests absorb it more slowly but store vastly more in their trunks and soil. Deforestation, meanwhile, releases all that stored carbon back into the atmosphere. Stopping tropical deforestation is just as important as planting new trees. The IPCC’s most ambitious pathways call for agriculture, forestry, and land use to collectively flip from a source of emissions to a net carbon sink by 2050.
Redesigning Industry and Manufacturing
Heavy industry, including steel, cement, chemicals, and plastics, produces emissions that are notoriously difficult to eliminate. Many of these processes require extreme heat or chemical reactions that inherently release CO2. Circular economy principles offer a partial solution: designing products to last longer, reusing materials, and recycling at higher rates so fewer raw materials need to be extracted and processed in the first place.
A review by the European Environment Agency found that circular economy strategies could reduce greenhouse gas emissions by an average of 33% across sectors. The potential varies widely. Waste management shows the highest relative reduction at around 52%, followed by construction and buildings at 48%, transport at 28%, and general industry at 26%. These aren’t theoretical maximums. They represent what’s achievable by rethinking supply chains, using recycled steel and concrete, and designing buildings for disassembly and material recovery.
Carbon Pricing and Policy Tools
Seventy-five carbon pricing instruments are now operating worldwide, ranging from carbon taxes to cap-and-trade systems. These mechanisms put a direct cost on emissions, creating a financial incentive for companies to pollute less. Global carbon pricing revenues crossed $100 billion for the first time in 2024.
The effectiveness of carbon pricing depends heavily on the price level. Many existing systems set prices too low to drive the rapid changes needed. Economists generally agree that prices need to reach $50 to $100 or more per ton of CO2 to meaningfully shift investment decisions in energy and industry. Beyond pricing, government policies like clean energy mandates, efficiency standards for buildings and appliances, and subsidies for electric vehicles and heat pumps all accelerate the transition by shaping markets directly.
Carbon Removal Technologies
Even with aggressive emissions cuts, most climate models show that some form of carbon removal will be necessary to reach net zero. Direct air capture, which uses chemical processes to pull CO2 directly from ambient air, is the most discussed technological approach. It works, but it’s expensive: current costs range from $400 to $1,000 per ton of CO2 captured. Newer designs using solar-powered high-temperature processes could bring that down to $160 to $200 per ton.
For context, planting trees removes carbon for a fraction of that cost, but forests face risks from fire, disease, and future land-use changes. Direct air capture offers permanence, since the captured CO2 can be stored underground in geological formations. Both approaches will likely be needed at scale. Neither is a substitute for cutting emissions at the source, which remains far cheaper and more effective per dollar spent.
What Individuals Can Do
Personal choices won’t solve climate change alone, but they’re not trivial either. Diet is one of the most impactful areas. Research comparing different eating patterns found that a vegan diet produces roughly 0.7 fewer tons of CO2 equivalent per person per year than a meat-heavy diet. That’s roughly equivalent to driving 3,000 fewer kilometers in a gasoline car. Even shifting toward less meat without eliminating it entirely makes a measurable difference, with vegetarian diets cutting about 0.2 tons per person annually.
Other high-impact individual actions include switching to an electric or hybrid vehicle, improving home insulation, installing a heat pump, flying less frequently, and choosing electricity providers that source from renewables. These choices also send market signals. When enough consumers shift their spending, industries follow. The most effective individual action, though, may be political: supporting candidates and policies that accelerate systemic change across all the sectors described above.