Write a 525- to 700-word essay about climate change; including the following information:
- How scientists learn about past global temperatures and climates.
- The greenhouse effect: What it is and what happens in the process.
- Greenhouse gases and their role in current climate change.
- One piece of data scientists offer to show that the climate is changing globally (see the NASA website: http://climate.nasa.gov/evidence/ ).
- Expected impacts of climate change in your area (this EPA website is very helpful: www3.epa.gov/climatechange/impacts/).
- Cite two or more outside sources for the information you present.