China and US make historic deal on emissions

A groundbreaking agreement struck by the US and China puts the world’s two worst polluters on a faster track to curbing the heat-trapping gases blamed for global warming.

The US, a chief proponent of the prospective treaty, is setting an ambitious new goal to stop pumping as much carbon dioxide into the air. China agreed for the first time to a self-imposed deadline of 2030 for when its emissions will top out.

Yet it wasn’t clear how either the US or China would meet their goals, nor whether China’s growing emissions until 2030 would negate any reductions in the US.