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Freshwater Pollution

Freshwater Pollution. Lesson 3. What is Pollution?. http://www.youtube.com/watch?v=a-x0AJQ5zHQ The addition of any substance that has a negative effect on water or the living things that depend on the water. Sources of pollution are classified, in part, by how they enter a body of water.

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Freshwater Pollution

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  1. Freshwater Pollution Lesson 3

  2. What is Pollution? • http://www.youtube.com/watch?v=a-x0AJQ5zHQ • The addition of any substance that has a negative effect on water or the living things that depend on the water. • Sources of pollution are classified, in part, by how they enter a body of water. • Two sources of pollution are 1. 2.

  3. Point and Nonpoint Sources • A pipe gushing polluted water into a river is an example of a _________________________ of pollution. • A widely spread source of pollution that can’t be tied to a specific point of origin is called __________________________.

  4. Effects of Pollutants • __________________ are chemicals intended to kill insects and other organisms that damage crops. • Bathing or swimming in polluted water can irritate the skin or cause more serious problems. • If we eat contaminated fish regularly, the toxic chemicals can build up in our bodies, which can also be harmful to your health.

  5. Human Wastes • The three major sources of water pollution are: 1. 2. 3. __________ is a disease caused by bacteria that live in human wastes, that can be fatal. http://www.youtube.com/watch?v=a-x0AJQ5zHQ

  6. Sewage in Cities • Wastewater is usually treated before being released into the environment. • During ____________ and _______________, sanitary sewers sometimes overflow and run into storm sewers. This can lead to polluted waters. • People often ______________ water for drinking and cooking after a flood to kill off many disease-causing organisms.

  7. Industrial Wastes • _____________________, __________________ and ____________________ are three types of pollutants produced by factories, mines and other industries. • _________________ is rain or another form of precipitation that is more acidic than others.

  8. Chemical Runoff • _____________ and ______________ water also carry away other pollutants from farm fields. • Gasoline, oil, and salt are __________________ sources that pollute rivers and lakes.

  9. Water Pollution Solutions • Solving pollution problems involves cleaning up exiting problems as well as preventing new ones.

  10. Cleanup • Many pollutants are removed from fresh water through natural cleanup processes. • _______________________ bacteria can also prove to be useful in breaking down toxic chemicals in rivers and lakes.

  11. Prevention • Many industries have found that ___________________________ techniques that conserve water also reduce pollution.

  12. Questions for Thought • What can the government do to clean up water pollution and to help prevent it? • Why should drinking water and sewage be kept separate? • How can pesticides pollute water? • What are three types of industrial pollutants?

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