The document discusses climate change patterns over time, fluctuations in solar output between 1800 and 2000, and the enhanced greenhouse effect. It notes past global temperature changes and their causes, describes the pattern of solar output which shows an increase then decrease, and references a website about the enhanced greenhouse effect and its role in climate change.

1. The Cases of Climate Change

2. How has the global temperature fluctuated in the past? What were the causes of these changes?

4. Describe the pattern of climate change shown above

11. The Enhanced Greenhouse Effect

12. http:// www.npr.org /news/specials/climate/video/