Human activity - mostly as a by-product of fossil fuelcombustion, partly by land use changes - increases the number of tiny particles (aerosols) in the atmosphere. In response to such reports, the World Meteorological Organization issued a warning in June 1976 that 'a very significant warming of global climate' was probable. By the time the idea of global cooling reached the public press in the mid-1970s temperatures had stopped falling, and there was concern in the climatological community about carbon dioxide's warming effects. Ehrlich mentioned climate change from greenhouse gases in 1968. The actual increase in this period was 29%. The general public had little awareness of carbon dioxide's effects on climate, but Science News in May 1959 forecast a 25% increase in atmospheric carbon dioxide in the 150 years from 1850 to 2000, with a consequent warming trend. In the scientific papers which considered climate trends of the 21st century, less than 10% inclined towards future cooling, while most papers predicted future warming. By the 1970s, scientists were becoming increasingly aware that estimates of global temperatures showed cooling since 1945, as well as the possibility of large scale warming due to emissions of greenhouse gases.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |