In recent years, there have been many alarming reports that the world’s climate is undergoing a significant change. All these reports provide strong evidence that world temperatures are increasing day by day. This increase is known as global warming caused by increased amounts of carbon dioxide around the earth. Most climatologists believe that the greenhouse effect is the most likely cause of this global warming. Climatologists predict that by midway through the next century temperatures may have risen by as much as 4 degree c. this could catastrophically reduce mankind’s ability to grow food , destroy or severally damage wildlife and wilderness, raise sea levels and there by flood coastal areas and farmland. The alarming news about Bangladesh is that as a result of the rise of the sea level the lower southern part of the country may one day go under water. The main culprits for global warming are carbon dioxide gas, produced by the burning of fossil fuels and forests and being careful and raising public awareness.