We may disagree on the causes of global warming; however, we cannot ignore that it is happening. Of course we still experience cold winters. On the other hand, average global temperatures have risen drastically for the last three decades. Polar ice caps are melting; as a result, sea levels are rising. Scientists predict more extreme weather in the coming decades. Droughts will probably be more common; in addition, flooding and tropical storm activity may increase. Some experts fear that rising temperatures may cause large amounts of methane gases to be released; this could be disastrous for our atmosphere. Climate change may have human causes; it might be a natural occurrence. Nevertheless, we must find ways to save our planet.