1. Global Warming
Beginning about 1850, however, the CO2 level began to rise, due in large part to the industrial burning of coal, oil, and natural gas. ... The remaining amounts of oil and gas are quite small, but the amount of coal that is subject to exploitation is essentially unlimited. ... It is also released as a result of forest clearing, venting in association with oil production, and leakage from natural gas pipelines. ...
- Word Count: 2775
- Approx Pages: 11
- Grade Level: Undergraduate