New · Impact simulator · instant what-ifs
Pick a place. Push the sliders. Watch it heal.
What if half of China’s grid went solar tomorrow? How much carbon would the EU save by electrifying its cars? Choose a region, drag the adoption levers, and watch tonnes of CO2 melt away in real time — powered by static, sourced reference data and honest arithmetic. No servers, no APIs, no waiting.
- 8 regions
- 4 adoption levers
- live before / after scene
- real statistics, baked in
Choose a region
Set the levers
adds 0 TWh of solar generation
adds 0 TWh of wind generation
0 of 0 cars go electric
0 of homes upgraded
CO2 avoided every year under your plan
0t
nudge a lever to begin
Grid mix
- 0 coal plants retired for a year
- 0 petrol cars off the road
- 0 mature trees growing for a year
- 0 homes running on the new clean power
How the math works (and where the numbers come from)
Everything is computed in your browser from a small table of static, sourced reference values (approximately 2023–24): each region’s electricity generation, the carbon intensity of its grid, its current generation mix, total territorial CO2 emissions, cars on the road, and an estimate of building-heating emissions.
- Extra solar / wind adds that share of the region’s generation as clean TWh. It displaces fossil generation first, valued at the fossil intensity (grid emissions ÷ fossil share), which is higher than the grid average. Additions are capped at the fossil share — beyond it, power is curtailed or exported.
- Electric cars converts a share of the fleet: each petrol car saves its tailpipe emissions (about 2.1 t CO2/yr at 12,000 km), minus the carbon of charging it on the post-plan grid — so green power makes EVs greener, live.
- Retrofits assumes heat pumps and insulation cut about half of the upgraded homes’ heating emissions.
- Equivalents: one average coal plant ≈ 3.8 Mt/yr; one petrol car ≈ 2.1 t/yr; a mature tree absorbs ≈ 22 kg/yr; an average home uses ≈ 4.8 MWh/yr.
Sources: Ember Global Electricity Review, IEA, Our World in Data, EPA and IPCC-equivalent factors. The model is deliberately simple — it ignores curtailment dynamics, grid storage, land-use and industry — so treat the outputs as honest ballparks for intuition, not investment forecasts.
Why this matters
Every decimal point is a decision someone hasn’t made yet.
The scenarios in here are imaginary; the levers are not. Solar, wind, heat pumps and electric drivetrains are all shipping today — the only unknown is the adoption percentage. Go bend a curve for real.