1. Global warming
Global warming is caused when factories and cars burn fossil fuels and let off carbon dioxide into the atmosphere. Carbon dioxide in the atmosphere plays an important role in warming the earth by trapping the earth's heat, in what's called the greenhouse effect. The burning of fossil fuels has generally increased the amount of carbon dioxide in the atmosphere. The carbon dioxide then puts a layer on the greenhouse gasses. ... Stop destroying rain forests as these act as sinks taking carbon dioxide from the air and using it up. ...
- Word Count: 496
- Approx Pages: 2
- Grade Level: High School