1. pollution
... into the atmosphere. Although wind and rain occasionally wash away the smoke given off by power plants and automobiles, the cumulative effe! ct of air pollution poses a grave threat to humans and the environment. A big example of smog is LA you can see the smog just hovering above the city ... be subject to that kind of environment. Scientists believe that all cities with populations exceeding 50,000 have some degree of air pollution. Burning garbage in open dumps causes air pollution Scientist have discovered that over the South Pole the ozone has a high level of ozone depletion. Those ...
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- Approx Pages: 3
- Grade Level: High School