While the phenomenon of global temperature increase is undisputed, the cause is still hotly debated, unfortunately too often lined up along political divisions rather than scientific. Your essay should examine the science behind the issue, including: 1. The main facts of how the climate is changing 2. The history of climate changes over various timescales 3. The possible causes of climate change, including both human-caused, and theories based on natural causes 4. Forecasts, both extreme and not so extreme, of how the global climate will change in the future, with the implications for possible scenarios.