President Donald Trump announced Thursday that the U.S. will withdraw from the historic Paris Agreement, an accord among 192 nations to combat the impacts of climate change. Echoing concerns raised in a recent letter to President Trump, National Farmers Union President Roger Johnson said the President’s decision “rejects science and U.S. leadership in an effort that requires global attention.” Johnson says family farmers and ranchers are already enduring consequences of climate change, and projections indicate these effects will worsen without an immediate and significant reduction in greenhouse gas emissions. He says the decision by President Trump “fails to recognize the very real and immediate threats of climate change to family farmers, ranchers, and our nation’s food security.” Johnson called the move by Trump “shameful,” saying the U.S. “cannot sustain a viable food system if climate change is left unchecked.”