Mongabay: Corn is the staple crop of the US. Its annual yield is more than twice that of any other American crop, covering an astounding 125,000 square miles. However, this behemoth crop is not without threats. A new analysis by Environment America, shows that lower yields of corn due to global warming will cost farmers 1.4 billion every year. “Corn likes it cool, but global warming is raising temperatures across the nation,” said Environment America Global Warming Advocate Timothy …