> US managed to do more about their CO2 emissions than Europe. That's because thanks to fracking the US move a large share of their energy generation towards natural gas, which burns 'cleaner' than oil and coal
The climate benefits of the lower CO2 emissions from burning gas, instead of coal and oil, are partially offset be the greater methane emissions. Then again, you can't compare natural gas CO2 + CH4 emissions to only CO2 from coal, as coal production also releases CH4.
As long as methane leaks from the natural gas supply are below 4% or 5%, gas is better than coal.