"Take for instance the cooling trend in the lower five miles of the atmosphere, detected by weather balloons, and independently confirmed by NASA's orbiting satellites. This data, gathered from all over the globe, through precise microwave and radio measurements, shows an average drop of 0.19ºF in air temperature since 1979. The National Academy of Sciences finds this cooling trend, which conflicts with the global warming hypothesis, "so pronounced as to be difficult to explain." "