Reuters: Americans have just endured one of the coldest winters in memory, so global warming may not be on their radar. But a new U.N. panel report has just refocused the public debate on a problem some scientists call the greatest threat facing the world.
There is trouble ahead for global agriculture, warns the influential Intergovernmental Panel on Climate Change, if measures are not taken quickly to reduce greenhouse gas emissions. The panel, which synthesizes the findings of thousands of peer-reviewed...