At the moment, Syria and Nicaragua. That's the company in which Trump wants to put the U.S.
There is zero enforcement mechanism. ZERO! The BRIC nations (nor Indonesia) aren't doing a thing under the agreement. In fact they are doing the opposite and vastly expanding coal production.
However in spite of Obama and the liberal war on fracking, through the 1000 fold increase in natural gas production the US is seeing a ginormous decrease in natural gas emissions.
See liberal only approve of wind (a horrible source) and solar (a source that has great potential but is decades away from being a via source). They hate natural gas, hydro and nuclear, 3 sources that produce little to no emissions!