China have to start cutting emissions then. But they can't increase emissions as much as they would otherwise have done between then and now. They were going to be building one gigantic (100 000 tons of CO2 a day pumped into the atmosphere) coal=powered station every year till 2050 and they've now abandoned those plans. They're going for wind and solar.
There have been major advances in solar technology and also battery storage capabilities and we're expecting solar power generation costs to ahieve parity with coal by 2020 and batteries capable of efficiently storing domestic-produced solar energy in ten years or less. A carbon tax or even a decent cap and trade policy would create funds to boost this and other energy innovation and speed it along so that we can transition our economies out of hydrocarbons asap. Unfortunately we have a bunch of fucking idiots funded by fossil fuel firms trying to keep things like they are.
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