Politico: Severe drought. Record heat. Extreme storms. In the past year, the United States has experienced conditions that have already become commonplace in many of the most volatile parts of the world. But not until the day of his second Inauguration did President Barack Obama put climate change squarely back on the table, after a long presidential campaign from which the issue had been largely absent.
While the fact of climate change might be fodder for political debate, it is widely accepted across...