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Man is partly responsible for global warming . Give reasons |
"Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations."the speeding up of global warming caused by the dieback of the rainforestsBurning fossil fuels (coal, oil and natural gas). This releases carbon dioxide that had been stored underground for millions of years. This extra CO2 is causing the enhanced greenhouse effect. Cutting down the earth's forests without replanting. Deforestation removes trees and vegetation that absorb and store carbon. Half a tree's weight is carbon, but when trees die they release their carbon and absorb no more. Releasing other greenhouse gases. Methane, a greenhouse gas twenty times more powerful than CO2, is belched by cattle. The world's demand for red meat means more and more cattle, and sometimes forests cut down for pasture. As frozen lands warm, from global warming, more methane is released. The world's growing demand for electricity. 500 million homes in India, for example, have no electricity. As the world's population grows, the demand for power grows too. At present most of the world's electricity is produced by burning fossil fuels. |