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is a great problem in our world. It not only causes fish and plants to die in the waters it contaminates, but adversely affects the entire food chain. is all the rain and snow that contains an unnatural acidic. Often times, the chemicals used to create today's i ....

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.... are usually to gradual for them to be noticed early. At the beginning of the 20th century most rivers and lakes like the river Tovdal in Norway had not yet begun to die. However by 1976 local inspectors were noticing that many of the lakes were beginning to show signs of death. Fish were found dead along the banks of many rivers. As the winters ice began to melt off more and more hundreds upon hundreds more dead fish were being found. As scientists continued to work they found many piles of dead fish, up to 5000 in one pile, further up the river. Divers were sent in to examine the bottom of the rivers. where they found many more dead fish. Many l ....