1. When ultraviolet rays from the sun separate an oxygen molecule into two single oxygen atoms in the stratosphere, the combination of a single oxygen atom and an oxygen molecule forms ozone.
2. You can make ozone test strips by yourself to find out about ozone levels in your own locale.
3. Long-time exposure to ozone is badly harmful to our respiratory system.
4. Chemicals in industrial waste gas and vehicle exhaust react with light to form lots of ozone at ground level.
5. Internal combustion engines and power plants cause the artificial tropospheric ozone, also known as bad ozone.
6. Ozone is very helpful because it absorbs UV radiation and separates us from it.
7. Using gasoline-powered lawn equipment in the late spring, summer and early fall may increase ozone pollution.
8. Ozone pollution occurs in urban and suburban areas as well as in rural areas.
9. In order to decrease ozone pollution, the EPA has set up more rigorous air-quality standards.
10. Pay close attention to the Air Quality Index in your area every day can keep you away from ozone exposure.文章精要
文章主要介绍了什么是臭氧,臭氧污染的形成、危害,以及臭氧有利的一 面。文章还具体介绍了如何自己手工制作检测仪;如何避免暴露在臭氧之下;如 何预防和减少臭氧污染等。
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