Global warming refers to an average boost in the Earth’s temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the subject of environment change, their fear is about global warming caused by human activities. We can help stop global warming by not burning rubber and plastics and stop using petrol powered cars and use solar powered cars.
Atmosphere
The atmosphere covers the Earth. It is a thin layer of mixed gases which make up the air we breathe. This thin layer also helps the Earth from becoming too hot or too cold, much like clothing does for us.
Oceans
Oceans cover about 70 percent of Earth’s surface. The atmosphere and ocean constantly exchange energy and matter. For example, water evaporates from the oceans into the atmosphere. This moisture then falls back to the Earth as precipitation – rain, snow, hail, and even the morning dew on the grass.
Land
Land covers 27 percent of Earth’s face.
Ice
Ice is the world’s largest supply of freshwater. It covers the remaining 3 percent of Earth’s surface including most of Antarctica and Greenland.