Greenhouse Effect. What happened? Why are you shivering? No sun rays. Before. I will go and check what happened. What happened? Now. Before. Sun. Earth. Greenhouse gases. Sun rays. The sun’s rays warm the earth. A part of the sun’s rays is absorbed by the earth. A part of the sun’s rays is reflected back in space. Greenhouse gases. A part of reflected rays is trapped by greenhouse gases. The trapped radiations of the sun warm the earth. Carbon dioxide. Methane. Nitrous oxide. Greenhouse gases. Why are they called greenhouse gases? Don’t worry. I will explain to you. Have you ever seen a greenhouse in a nursery? No. Ok. I will show you. Nursery. In a greenhouse, the sun’s heat can come in. but cannot go out. The trapped heat warms the greenhouse. It is very hot inside here. This trapped heat helps in controlled growth of plants. In a greenhouse, the sun’s heat can come in but cannot go out. The trapped heat warms the greenhouse. Similarly, as these gases trap the sun’s heat, they are called greenhouses gases. If there were no greenhouse gases to trap the sun’s radiation the earth would be a very cold place where we would not survive. Where are the greenhouse gases? Greenhouse gases party. What are you doing here? The earth needs you. Thank you. This trapping of heat to keep the earth warm is called greenhouse effect. Thank you. The End.