United States-China environment cooperation

I saw this article posted to President Barack Obama's Facebook page:

"Chinese cities pledge early carbon emissions peak under deal with U.S."

I am delighted that the United States and China are both working together to curtail the amount of pollution they each generate. The two nations might disagree on a variety of issues but it pleases me when they find common ground and that good feeling is further increased when it's on an important issue such as the environment.

I tend to dismiss comments that debate whether or not climate change is man-made because I think that reducing pollution is a noble goal in itself. Why would anyone want to live in a toxic world?