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Cfc
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The beginning of the (chlorofluorocarbons) era started in 1928, when ' were invented by a Du Pont chemist. ' were best known as "freons" and became famous as a safe, nonflammable refrigerant. It's invention became a great triumph when Freon took the place of sulfur dioxide or ammonia which was used ....
Middle of essay
.... can cause a catastrophe for Earth's living beings, including humans, by allowing large amounts of the deadly ultraviolet-B radiation to reach to Earth's surface. Rowland and Molina checked their calculations again and again to make sure that these figures had not a single mistake in it because this conclusion was likely to destroy an $8 billion industry already in the United States. However, the lives of the living beings were far more important than businesses so in 1974 Rowland and Molina, ha.... |
| Number of words: 1018 |
Approximate pages: 4 |
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