AOD #12

Global warming is “the increase in the average temperature of the Earth's near-surface air and oceans”. This has been happening ever since the mid-twentieth century and will continue to keep happening. Global warming is mainly caused by something called the greenhouse effect. The earth’s atmosphere absorbs solar energy and also radiates solar energy back into space. A lot of the energy that is going back to space is absorbed by “greenhouse” gases in the atmosphere. The greenhouse gases cause the atmosphere to get thicker, which causes more of the solar energy to be reflected towards the earth’s surface, causing the earth to be warmer than it was originally.