How much increase the carbon dioxide produced past 100 years?
Answers
Temperatures have increased by about 0.5° Cover the last 100 years. Most of these increases occurred in the first 50 years of this time period.
Carbon dioxide (CO2)has also increased over the last 100 years-- from about 300 ppm to 370 ppm. Interestingly, the majority of these additions have occurred in the last 50 years, when temperature increases have been slowest.
Independent data from orbiting satelites have been continuosly measuring global temperatures since the 1970's and indicate that over the last 25 years there has actually been a slight decrease in overall global temperatures.
Assuming that at least part of the source of CO2 additions in the last 50 years is anthropogenic (man-made), the likely scenario is (at the level of additions involved) that CO2 concentrations in our atmosphere are an effectof temperature-- not the other way around. The perturbation of CO2 equilibrium has not had the proportional effect on temperature that greenhouse activists predict.
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