Productivity Declines 1.7% For Every Additional Degree Centigrade

The economy gets drowsy in hot weather. And that's bad news for a warmer world. A new study finds that in the United States, economic productivity declines by 1.7 percent per degree Celsius on a warm day. The strongest effects are from the agricultural and manufacturing sectors, where people work outside. Chris Mooney in The Washington Post.

The Commerce Department retaliates against Asia's solar industry. The department found that manufacturers in China and Taiwan were selling panels for less than it cost to make them, aided by state subsidies, and will impose punitive tariffs on imports. Diane Cardwell in The New York Times.