Monday, July 30, 2012

Climate change skeptic is now believer

The Berkeley project’s research has shown, Muller says, “that the average temperature of the Earth’s land has risen by 2 1/2 degrees Fahrenheit over the past 250 years, including an increase of 1 1/2 degrees over the most recent 50 years. Moreover, it appears likely that essentially all of this increase results from the human emission of greenhouse gases.”