Well he is a universtity of Iowa grad wow....
It seriously cracks me up when anyone cites a 1 degree tempeture increase over 100 years. Lets see Urban Sprawl? Millions of miles of black pavement that were not there. Cities made of steel and concrete. That should = at least a 1 degree increase. Now how bout the A:Quality of equipment they used to measure the tempeture with, and B:The frequency that records were kept. Have you ever seen a thermometer from 100 years ago? They were FAR from eficient. Now lets look at C: Who was keeping these measurments? Global warming is a ffin joke. For those old enough to remember the 70s maybe you recall the Ice age scare? Thats right these same brilliant minds of science were saying there would be an ice age because of all our hairspray use. *rolls eyes at loons* Btw this guy IS NOT the top scientist at Nasa.
