"Green House Effect"

A greenhouse is a house made of glass. It has glass walls and a glass roof. People grow vegetables and flowers and other plants in them. A greenhouse stays warm inside, even during winter. During the daylight hours, a greenhouse gets warmer and warmer and stays pretty warm at night too. This is because the heat received from the sun is trapped inside the greenhouse by the glass. The Earth is also like a greenhouse. The greenhouse effect is a natural process that warms Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs). The absorbed energy warms the atmosphere and the surface of the Earth. As a result, the Earth gets hotter. As a result of global warming, the ice on the Earth's surface of the is melting fast due to extreme heat. Oceans and seas are warming too. All the ice that melts will fill up the oceans and seas and they will overflow on land. Thus a huge area of land will go under water. Some of the best land for growing food is also the most low-lying. That means it will be flooded first. Even some big cities like London, Kolkata and Bangkok will get flooded. That mean thousands of people will lose their houses and land and they will go hungry. Moreover, as the earth's climate warms up, the weather gets more violent. Storms and cyclones will become mere powerful. More areas will get drier and turn into deserts.There will be heavier rains too. So there will be more floods and river erosion.