What is green house effect ?explain

A greenhouse is a place where plants are kept and its roof is covered either by glasses or by any other transparent object. In colder climates, in order to maintain a warm atmosphere for plants, they are kept in the closed glass houses. Through these glasses, sunlight will enter the house and later, the greenhouse won’t let the heat go out. Glass traps the heat. By this process, the temperature inside the greenhouse will be higher than the temperature outside.

The same phenomenon takes place in our atmosphere and it has the same effect like a greenhouse. When the UV (ultraviolet) radiations enter the earth, a part of them is absorbed by the earth and rest is reflected back to the atmosphere. Some gases like carbon dioxide, methane, nitrous oxide, water vapour, etc. trap the reflected UV radiations and don’t let the heat escape the atmosphere. This eventually elevates the temperature of the earth’s surface. This atmospheric effect is known as the greenhouse effect. The gases that are involved in the greenhouse effect are called the greenhouse gases.