Dear student, The burning of fossil fuels such as coal and petroleum releases greenhouse gases such as carbon dioxide and methane into the atmosphere. These green house gases cause green house effect. Green house effects is the phenomenon in which heat radiated from the warmed earth’s surface is absorbed by green house gases present in the atmosphere. This trapping of heat increases earth’s average temperature and resulted in the phenomenon known as global warming. Negative consequences of green house effect: Global warming caused as result of green house effect causes melting of glaciers and undesirable rise in sea level. Global warming also causes climatic change.