Uncertainties over climate change remain for next leader

Will the next US president cast a shadow on cooperative climate action between China and the United States?

That sounds worrisome if Donald Trump wins the election, as he has yet to be convinced that human activities cause climate change and blamed China for creating the problem.

"The concept of global warming was created by and for the Chinese in order to make US manufacturing noncompetitive," Trump said in a 2012 tweet.