What Actually
Works

Solar and wind power are now the cheapest sources of electricity in history. The cost of solar panels has fallen over 90% since 2010. Wind power costs have dropped 70%. In most of the world, building new renewable energy is now cheaper than running existing coal plants.

The transition is already underway: renewables provided about 30% of global electricity in 2023, up from 20% a decade ago. The IEA projects that solar alone could be the world's largest source of electricity by 2030. The challenge is not technology or cost — it is the speed of deployment and the political will to phase out fossil fuels.

Electrification means replacing fossil fuel-powered devices — cars, furnaces, stoves, industrial equipment — with electric alternatives powered by clean electricity. It is one of the most powerful levers available because it simultaneously decarbonizes multiple sectors.

Electric vehicles produce 50–70% less lifetime emissions than petrol cars even on today's grids — and that advantage grows as grids get cleaner. Heat pumps are 3–4× more efficient than gas furnaces. Induction stoves are faster, safer, and cleaner. The key insight: electrify everything, then clean up the grid.

Protecting and restoring natural ecosystems — forests, wetlands, grasslands, mangroves, and soils — could provide up to 30% of the emissions reductions needed by 2030. These are not alternatives to cutting fossil fuel emissions; they are essential complements.

Halting deforestation alone would eliminate roughly 10% of global emissions. Restoring degraded forests could sequester billions of tonnes of CO₂. Protecting peatlands — which store twice as much carbon as all the world's forests combined — is critical. Healthy oceans absorb about 25% of human CO₂ emissions.

The global food system accounts for about 26% of greenhouse gas emissions — from land use change, livestock, fertilizers, and food waste. Transforming how we produce and consume food is one of the most impactful levers available, and it does not require waiting for new technology.

Shifting toward plant-rich diets — not necessarily vegan, but with significantly less beef and dairy — could reduce food emissions by 50–70%. Cutting food waste (currently about one-third of all food produced) could eliminate 8–10% of global emissions. Regenerative agriculture can turn farmland from a carbon source into a carbon sink.

Individual actions matter — but systemic change is what makes them possible at scale. Carbon pricing, clean energy standards, building codes, vehicle emission standards, and fossil fuel subsidy reform are the policy tools that shift entire economies.

Carbon taxes and cap-and-trade systems create financial incentives to reduce emissions across every sector. The EU Emissions Trading System has driven significant reductions in European industry. The US Inflation Reduction Act — the largest climate investment in history — is projected to cut US emissions 40% by 2030. Policy change is ultimately driven by political will — which is shaped by public pressure.