|Vladimir Putin and Xi Jinping after signing their second mega deal on gas. Source: Russia Today.|
Now back to the US-China deal. China would not agree to a deal if it did not believe that it can stop its emissions from rising by 2030 without incurring additional costs. It would not believe that it can stop its emissions from rising by 2030 if it did not have access to large amounts of cleaner sources of energy (together with an economy that is expected to peak at around 2030 as well, of course). Russian gas is, at least in part, just the assurance that China needed to agree to a deal with the US.