Yes, the average temperature over the past 100-150 years has risen about 1 degree. However records suggest that 60 million years ago, around the beginning of the Cenozoic, temperatures were probably 15 degrees higher than they are today, and that most of the cooling occurred within the past 30 million years, when the rise of the Himalayan mountains resulted in increased carbon pulldown (not sure if that is the correct term - I'm referring the process in which chemical weathering results in decreased atmospheric CO2).
So we were at a low point, the temperature was not going to continue to decrease without end. I'm not saying this whole issue isn't a problem, I just think that looking at records from a hundred years is not sufficient to prove that it is a problem.
Analysis of stromatolites from the Precambrian suggest that the length of a year was about 450 days. Precambrian is > 570 million years ago. If it took more than 570 million years to change the length of a year by less than 100 days, the only way the dinosaur extinction could be explained by a rapid change in the length of a year is by some catastrophic event forcing that change.
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Yes, the average temperature over the past 100-150 years has risen about 1 degree. However records suggest that 60 million years ago, around the beginning of the Cenozoic, temperatures were probably 15 degrees higher than they are today, and that most of the cooling occurred within the past 30 million years, when the rise of the Himalayan mountains resulted in increased carbon pulldown (not sure if that is the correct term - I'm referring the process in which chemical weathering results in decreased atmospheric CO2). So we were at a low point, the temperature was not going to continue to decrease without end. I'm not saying this whole issue isn't a problem, I just think that looking at records from a hundred years is not sufficient to prove that it is a problem.
Analysis of stromatolites from the Precambrian suggest that the length of a year was about 450 days. Precambrian is > 570 million years ago. If it took more than 570 million years to change the length of a year by less than 100 days, the only way the dinosaur extinction could be explained by a rapid change in the length of a year is by some catastrophic event forcing that change.