I'm unsure about who or what is responsible for climate change, but if it is indeed caused mainly by pollution, then China are far more responsible than Western countries IMO.

I can't see diesel and petrol cars being banned by 2030.  The amount of upgrading to the electricity network for everyone charging their vehicles would be unreal, with streets being blocked and dug up in towns all over the country over the next 10 years and new power stations having to be built.  These would have to be coal or nuclear.. windfarms and solar wouldn't cut it as we can't store power in quantities vast enough and Hydro only provides tiny amounts for short periods of time.

I just don't see the planning going into this that would be required.  These are political soundbites designed to make people look good IMO.