Mitigating climate change requires cutting global CO2 emissions roughly 45% from 2010 levels by 2030 and reaching net zero around 2050, according to the IPCC’s pathways for limiting warming to 1.5°C. That’s an enormous shift, but it breaks down into concrete actions across energy, transportation, food, buildings, industry, and land use. Some of these changes happen at the policy and infrastructure level, others start at your front door.
Shift to Renewable Energy
Burning fossil fuels for electricity is the single largest source of greenhouse gas emissions globally, which makes the energy transition the most important lever. Solar and wind power are now cost-competitive with or cheaper than new coal and natural gas plants in most markets. The remaining challenge is storage: utility-scale lithium-ion battery systems currently cost around $334 per kilowatt-hour, but projections from the National Renewable Energy Laboratory show those costs dropping to $147–$339/kWh by 2035 depending on how aggressively manufacturing scales up.
Cheaper storage matters because it lets grids run on renewables even when the sun isn’t shining or the wind isn’t blowing. As battery costs fall, the economic case for retiring fossil fuel plants strengthens. Countries and utilities that invest in grid-scale storage now will decarbonize faster and face fewer reliability concerns during the transition.
Electrify Transportation
Transportation accounts for roughly a quarter of global CO2 emissions. Electric vehicles produce zero tailpipe emissions, but manufacturing their batteries does carry a carbon cost upfront. Lifecycle analyses show that over a vehicle’s full lifespan of around 350,000 km (roughly 217,000 miles), an EV produces about 48% less total carbon than a comparable gasoline or diesel vehicle. The longer you drive an EV, the more that upfront manufacturing cost gets diluted by years of cleaner operation.
Beyond personal cars, electrifying public transit buses, delivery fleets, and freight trucks has an outsized effect because these vehicles log far more miles per year than the average passenger car. Cities investing in electric bus fleets and charging infrastructure see compounding emission reductions over the vehicles’ long service lives.
Decarbonize Buildings
Heating and cooling buildings is a major emissions source, especially in regions that rely on natural gas furnaces and boilers. Heat pumps, which move heat rather than generating it by burning fuel, are the most effective replacement. Modern air-source heat pumps operate with a coefficient of performance (COP) between about 2.2 and 3.7 depending on climate, meaning they deliver two to nearly four units of heat for every unit of electricity consumed. A gas furnace, by contrast, can never exceed a 1:1 ratio.
The emission reductions are dramatic. Over a 15-year lifespan, switching from a gas furnace to an air-source heat pump cuts heating emissions by 53% in a moderate climate like Alabama, 86% in Texas, and over 93% in California, where the electrical grid is already relatively clean. Heat pump water heaters show similar gains, reducing emissions 50–90% compared to gas boilers depending on location. As electrical grids get cleaner over time, these numbers only improve.
Insulation, efficient windows, and smart thermostats complement heat pumps by reducing the total energy a building needs in the first place. Retrofitting older buildings with better insulation is one of the most cost-effective climate investments available.
Cut Methane Emissions
CO2 gets the most attention, but methane is roughly 80 times more potent as a greenhouse gas over a 20-year period. It also breaks down in the atmosphere much faster than CO2, which means reducing methane delivers noticeable cooling effects within a decade or two rather than centuries. The largest industrial sources are oil and gas operations, where methane leaks from wells, pipelines, and processing equipment.
The primary technical fixes are leak detection and repair programs and flaring reduction measures. These aren’t exotic technologies. In many cases, fixing leaks actually pays for itself because the captured methane is sellable natural gas. The Global Methane Pledge, signed by over 150 countries, targets a 30% reduction in methane emissions by 2030, largely through these kinds of infrastructure improvements in the fossil fuel sector.
Transform Industry With Green Hydrogen
Steel, cement, and chemical production are among the hardest sectors to decarbonize because they rely on extreme heat and chemical reactions that traditionally require fossil fuels. Steel is a prime example: conventional blast furnaces use coal or coke to strip oxygen from iron ore, releasing enormous amounts of CO2 in the process.
Hydrogen-based direct reduction is the most promising alternative. When green hydrogen (produced using renewable electricity) fully replaces natural gas in the direct reduction process, CO2 emissions from steelmaking drop by 91%. Several pilot plants in Europe are already testing this at commercial scale. Steel alone accounts for roughly 7% of global CO2 emissions, so cleaning up this single industry would have an outsized impact.
Use Land as a Carbon Sink
Forests, soils, and wetlands naturally absorb CO2 from the atmosphere. Protecting existing forests prevents stored carbon from being released, while regenerative agriculture can turn farmland into a net carbon sink. Research published in Frontiers in Sustainable Food Systems quantified how much carbon different farming practices pull into the soil each year.
Cover cropping alone sequesters about 0.58 tons of carbon per hectare per year on cropland. No-till farming stores roughly 0.48 tons. Combining both practices nearly doubles the effect to about 1.01 tons of carbon per hectare annually. On land with woody perennials like vineyards, the numbers are even higher: cover cropping paired with no-till stores around 1.43 tons of carbon per hectare per year.
These numbers may sound modest per hectare, but cropland covers roughly 1.5 billion hectares worldwide. Even partial adoption of regenerative practices across that area adds up to meaningful carbon removal. Unlike technological solutions, regenerative agriculture also improves soil health, water retention, and crop resilience.
Scale Up Carbon Removal Technology
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 (DAC) uses chemical processes to pull CO2 directly from ambient air. The technology works, but cost remains the central obstacle.
Climeworks, the company operating the world’s largest DAC facility in Iceland (capacity: 36,000 tons of CO2 per year), is estimated to spend around $1,000 per ton removed, with a target of reaching $400–$600 per ton. In late 2024, Google signed a deal with a competitor called Holocene at $100 per ton, a figure that, if verified at scale, would represent a tenfold cost reduction. Engineers in the field generally consider $500 per ton the threshold at which DAC becomes a viable tool in the energy transition. Current global capacity is tiny compared to the billions of tons that need to be removed, so dramatic scaling is required alongside cost reductions.
Change What You Eat
Food systems account for roughly a quarter of global greenhouse gas emissions, and the differences between protein sources are staggering. Producing one kilogram of beef generates 14–68 kg of CO2 equivalent, depending on farming methods and region. Chicken comes in at 1.4–3.3 kg CO2-eq per kilogram. Legumes like lentils, chickpeas, and beans average just 0.27 kg CO2-eq per kilogram in the United States, and cereals fall in a similar range of 0.2–1.0 kg.
That means swapping beef for legumes in a single meal can reduce that meal’s carbon footprint by 50 to 100 times. You don’t need to go fully vegetarian for this to matter. Simply replacing a few beef meals per week with chicken, legumes, or plant-based alternatives produces a significant cumulative reduction over a year. Multiply that across millions of households and the effect on agricultural emissions, land use, and deforestation becomes substantial.
How Individual and Systemic Action Connect
Personal choices like switching to a heat pump, driving an EV, or eating less beef are real and measurable. But the largest reductions depend on systemic changes: cleaner electrical grids, industrial decarbonization, methane regulations, and investment in carbon removal infrastructure. These require policy, corporate decisions, and public investment.
The two aren’t separate. Consumer demand for EVs drives automakers to invest in electric platforms. Households installing heat pumps create the installer workforce and supply chains that make the technology cheaper for everyone. Dietary shifts reduce the economic incentive to clear forests for cattle ranching. Individual action builds the market conditions and political will that make systemic change possible, and systemic change makes individual choices more effective by cleaning up the grid and supply chains behind them.