It may or may not exist. However its best to be on the safe side. Plus it never hurts to reduce one's carbon footprint and emissions.
It may have been exaggerated but I hate to think world leaders holding a summit for nothing
I was joking when I made the lakes remark. Loosen up !
if all nations agrees on working on it, of course is better.
The problem was, the US was the one that put so much effort promoting this Global warming thingy, its primary objective was to drag every nations into spending billions, but excluding herself.