Nearly 200 nations faced a Monday deadline to file what the U.N.'s climate chief calls 'among the most important policy documents governments will produce this century.'

Most of the world’s nations have missed a UN deadline to set new climate targets as efforts to curb global warming come under pressure following U.S. President Donald Trump's election.

Many of the world's biggest polluter nations have missed a U.N. deadline to set new climate targets as efforts to curb global warming come under pressure following U.S. President Donald Trump's election.