This document discusses global warming, including its causes, effects, and projections. It begins by defining global warming and the greenhouse effect. It then outlines both natural causes like methane release and man-made causes such as burning fossil fuels. Effects already observed include rising sea levels and impacts on plants and animals. Future predictions include increased temperatures, sea level rise, and species extinction. The document concludes by suggesting precautions like using more efficient vehicles and planting trees to help prevent further global warming.