A Greenhouse is a house made of glass.It has glass walls and a glass roof.People grow vegetables, flowers and other plants in them. A Greenhouse stays warm inside,even during winter. During the daylight hours,a greenhouse get warmer and warmer and stays pretty warm at night too. This is because the heat received from the sun is trapped inside the green house by the glass.
The earth is also like a greenhouse. During the day Earth's surface warms up in the sunlight. At night,the surface cools, releasing the heat back into the air. But some of the heat is trapped by gases like carbon dioxide in the the atmosphere. There gases,called greenhouse gases, work like the glass walls and the roof and keep the Earth warm. This is global warming and it is making the Earth a dangerous planet.
Unfortunately,we are making the earth too hot. We are using oil, gas and coal for running cars, buses,trains, planes,power station and so on. This fuels have carbon in them. This carbon and other gases trap the heat in the atmosphere and do not allow the earth to cool down. As a result,the Earth is give hotter.
What happens as a result of global warming? The ice on the Earth's surface is melting fast due to extreme heat. Oceans and seas are warming too. All the ice thst 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 means 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. Stroms and cyclones will become more powerful. More area will get drier and turn into dessert. There will be heavier rain too. So there will be more floods and river erosions.
Outcomes ( results or effects ) of global warming:
- Polar bears and penguins will disappear.
-Winters will be 10 degree colder.
-Africa will become hotter and have more droughts.
-Cyclone and hurricanes will become more powerful.
-Diseases like skin cancers will increase.
-Many countries will have no drinking water.
-Countries such as the Maldives, Holland and Bangladesh will disappear under water.
-Wars will start between countries fighting over water.
