Experts have mixed reactions to the recent U.N. climate talks in the Amazon.

Nearly 200 nations faced a Monday deadline to file what the United Nations’ climate chief calls “among the most important policy documents governments will produce this century."

Experts say the world is heading for considerably less warming than projected a decade ago, but that good news is overwhelmed by much more pain from current climate change than scientists anticipated.

This week’s climate change summit features lots of talk from different nations about their goals for reducing carbon emissions.