1. Global Warming
... that natural process could cause the rise in temperature. Changes in the path of revolution of the Earth around the sun could cause global warming. Orbital variation changes how sunlight is distributed on the surface of the planet. But, evidence suggests that human activities have caused this ... effect. Natural conditions can release large amounts of CO2 and cause these fluctuations. Forrest fires and volcanic activity produce large amounts of CO2. Global warming is caused primarily by human activities most importantly - the burning of fossil fuels. When coal gas and oil are burned, t...
- Word Count: 751
- Approx Pages: 3
- Has Bibliography
- Grade Level: High School