A greenhouse is made of glass and it traps the sun light inside and keeps the plants warm in winter. The earth is like a greenhouse. The surface warms up in the sunlight and it cools at night. But some of the heat is trapped by the greenhouse gases. If the green house effect is strong, the Earth gets warmer and this is what is happening now. It is called global warming. Ice is melting in the poles because of the increase in the Earth’s temperature. We can see the climate change all over the world. Winters are colder and summers are hotter now. Droughts and floods are common but we must do something immediately.
The Earth is getting warmer because - - - - .