Often we see posted on this board how wildly erroneous Dr. James Hansen's predictions have been. Almost always without any supportive links. So what is Dr. Hansen's record on his predictions. Here is one from an early paper in 1981. The whole paper is available at the link. http://thedgw.org/definitionsOut/..\docs\Hansen_climate_impact_of_increasing_co2.pdf Summary. The global temperature rose by 0.20C between the middle 1960's and 1980, yielding a warming of 0.4°C in the past century. This temperature increase is consistent with the calculated greenhouse effect due to measured increases of atmospheric carbon dioxide. Variations of volcanic aerosols and possibly solar luminosity appear to be primary causes of observed fluctuations about the mean trend of increasing temperature. It is shown that the anthropogenic carbon dioxide warming should emerge from the noise level of natural climate variability by the end of the century, and there is a high probability of warming in the 1980's. Potential effects on climate in the 21st century include the creation of drought-prone regions in North America and central Asia as part of a shifting of climatic zones, erosion of the West Antarctic ice sheet with a consequent worldwide rise in sea level, and opening of the fabled Northwest Passage.