On October 28, Reps. Henry Waxman (D-CA) and Bobby Rush (D-IL) sent a letter to the House Energy and Commerce Committee requesting that a hearing be held analyzing the Berkeley Earth Surface Temperature Project’s work on global warming. The project is led by University of California-Berkeley physics professor Robert Muller, and after analyzing 1.6 billion temperature measurements from more than 39,000 temperature stations the project found an average rise of 1 degree Celsius in world land temperatures since the middle of the 20th century.