What Is the Paris Climate Agreement That Joe Biden Will Rejoin, Why Did Donald Trump Leave?
http://www.newsweek.com/what-paris-climate-agreement-why-did-donald-trump-leave-joe-biden-rejoin-1562349
President-elect Joe Biden plans to rejoin the historic Paris climate agreement on the day he is inaugurated, according to his chief of staff Ron Klain.
So what is it, and when and why did president Donald Trump leave?