Environment means the things by which we are surrounded.many things are happening around us and in the world which can damage our environment.one of the problem we are facing now is global warming.global warming means rise in the temperature of the earth and its surface.main cause of global warming is due to human beings.as for our comfort we cut or clear trees to build buildings,hospital,malls etc.as plants and trees absorb carbon dioxide from the air for photosynthesis.
effects of global warming areSea level rise became faster over the last century.Ice is melting worldwide, especially at the Earth’s poles. This includes mountain glaciers, ice sheets covering West Antarctica and Greenland, and Arctic sea ice.Less fresh water will be available. If the Quelccaya ice cap in Peru continues to melt at its current rate, it will be gone by 2100, leaving thousands of people who rely on it for drinking water and electricity without a source of either.Ecosystems will change—some species will move farther north or become more successful; others won’t be able to move and could become extinct. Wildlife research scientist Martyn Obbard has found that since the mid-1980s, with less ice on which to live and fish for food, polar bears have gotten considerably skinnier. Polar bear biologist Ian Stirling has found a similar pattern in Hudson Bay. He fears that if sea ice disappears, the polar bears will as well.