The World Is Warming All four major analyses of Earth’s average surface temperatures (NASA, NOAA, Hadcrut4, and Berkeley Earth) document global warming since 1950 of approximately 0.9 degrees Celsius (1.6 degrees Fahrenheit). There was very little change in temperature from 1950 to 1970. The world warmed 0.6 degrees from 1970 to 1998. There was very … Continue reading Greenhouse gases cannot physically cause observed global warming