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."

As climate change accelerates, plants face mounting pressure to adapt to shifting ecosystems and environmental conditions. This challenge is especially urgent for crops—plants resilient to drought and heat are essential to secure food supply in an unpredictable future.

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.