"Global warming is a well-established fact. This statement is only half true. A more correct statement would be “global warming and global cooling are both well-established facts.” The earth is almost always warming or cooling. Since the year 1800, the earth has warmed by about 1° C, with much of the warming taking place before much increase of atmospheric CO2. There was a quite substantial cooling from about 1940 to 1975. There has been almost no warming for the past 20 years when the CO2 levels have increased most rapidly. The same alternation of warming and cooling has characterized the earth’s climate for all of geological history.
…more CO2 will be a benefit to humanity. The predicted warming from more CO2 is grossly exaggerated. The equilibrium warming from doubling CO2 is not going to be 3° C, which might marginally be considered a problem, but closer to 1° C, which will be beneficial. One should not forget that the “global warming” is an average value. There will be little warming in the tropics and little warming at midday. What warming occurs will be mostly in temperate and polar regions, and at night. This will extend the agricultural growing season in many countries like Canada, Scandinavia, and Russia. More CO2 greatly increases the efficiency of photosynthesis in plants and makes land plants more drought-resistant. So, the net result of more CO2 will be strongly beneficial for humanity."
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