Bloomberg: Global warming is expected to take an increasing toll on the economy, food production, fresh water supplies and human health as the century progresses, according to a draft study for the United Nations. A temperature increase of 2.5 degrees Celsius (4.5 degrees Fahrenheit) since industrialization may lead to losses of as much as 2 percent of global economic output, an analysis by the UNs Intergovernmental Panel on Climate Change showed. Temperatures have already risen by about 0.8 degrees. The...