The beginning of the CFC(chlorofluorocarbons) era started in 1928, when CFC' were invented by a Du Pont chemist. CFC' 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 as the working liquid in refrigerators. It eventually became widely used in automobile air conditioners and nontoxic propellants in aerosol cans. It's insulating properties …
showed first 75 words of 1019 total

showed last 75 words of 1019 total
…In short the effects of UV-B has been detected all over the world in all kinds of environments, even 60 feet under clear water which hurts many types of fish, mollusks, and most importantly phytoplankton. Destruction of these phytoplanktons would give serious problems to fishes which depend on these small creatures for food, and eventually effect humans. Global warming can also be caused by the reduction of phytoplanktons, because absorption of CO2 would be significantly reduced.