9/10th of a degree celsius. mark: 9/10th degree of celsius is that a lot? >> no. could not have been caused by human beings, we haven't put enough co2 in the air, and one in the later part of the 20th century that slows down or depends whose data you use only to resume with the big el nino that covered the news the last couple of years. that means that probably half, maybe half of that nine-tenths of the degree might be caused by greenhouse gases. when the planet warmed beginning 1976, the temperature of the stratosphere started to stop, that's the prediction of greenhouse theory that's not intuitive. the great philosopher of science carl popper said if you can meet a difficult prediction with your theory, you can