What is global warming

Global warming is a term used to describe the increase in average global temperatures due to the greenhouse effect.
Scientists generally agree that the Earth's surface has warmed by about one degree Fahrenheit in the past 140 years. That might not sound like much, but it has definitely impacted the earth. Scientists also think the rate at which the earth is heating up is increasing. The greenhouse effect is what scientists believe is causing the sharp increase in global temperatures. The earth's atmosphere traps solar radiation, caused by the presence of gases such as carbon dioxide, water vapor, and methane (from pollution) in the atmosphere, which allows incoming sunlight to pass through it but won't allow the heat to escape back out (like in a greenhouse).
Climate change can negatively affect the earth's delicate ecosystems. Global warming has been linked to dying coral reefs, dangerous new weather patterns and the extinction of plant and animal species.