text: Khabibullo Abdusamatov , mathematician and astronomer at Pulkovskaya Observatory of the Russian Academy of Sciences: Global warming results not from the emission of greenhouse gases into the atmosphere, but from an unusually high level of solar radiation and a lengthy almost throughout the last century growth in its intensityAscribing greenhouse effect properties to the Earths atmosphere is not scientifically substantiatedHeated greenhouse gases, which become lighter as a result of expansion, ascend to the atmosphere only to give the absorbed heat away.