... gathering or hunting naturally available plants, animals and wood. Each stage in the evolution of human society (the development of farming, domestication of animals, harnessing of wind and water ... would absorb and retain heat. Carbon dioxide in the atmosphere is transparent to the sun'sshort -wave radiation, which is primarily in the ultra-violent and visibleportions of the electromagnetic ... climatic changes which are taking place to a certain extent.Since the Stockholm Conference in 1972, more and more attentions have been drawn to the issue of globalwarming, which is the increase in global...