The top three countries _today_, and China is > 2x the US, who is ~ 2x India -- China alone emits 30% of the CO2. How should we force China to stop emitting?

The top three countries _today_, and China is > 2x the US, who is ~ 2x India -- China alone emits 30% of the CO2. How should we force China to stop emitting? India wasn't even in the top 50% 20 years ago -- the nation is developing, they're burning fossil fuels and they're going to keep doing it to bring their people out of poverty. Should they keep their population in poverty? What about other developing nations? Will Nigeria and Indonesia and Pakistan and Brazil decide that they'd rather keep their populations poor than build fossil fuel plants?