Trump and his EPA administrator may not believe climate change is real, but his secretary of state and many of his generals do. In fact, the Pentagon has described it as "an urgent and growing threat to our national security." Cutting annual funding to developing countries to fight climate change  it amounts to about twice what the Pentagon spends each year on military bands  would only make it harder for them to address natural disasters and may increase the odds of refugee flows and conflicts over basic resources. It would also reduce U.S. influence in countries most vulnerable to such risks.