August 3, 2014
The phenomenon of global warming during the period 1975-2005 is indisputable, but many astronomers think that this is an effect of the variations of the Sun and that the human contribution is negligible. Carbon dioxide is not a pollutant, it is a vital gas, the main aliment of plants and its greenhouse effect has been widely exaggerated. Since 2003 the mean global temperature has either been stagnant or even slightly decreasing. Four simple astronomical arguments supporting these ideas are presented and discussed. It seems that we will reach a cooler period as soon as 2015 or 2016.
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