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http://www.youtube.com/watch?v=a-x0AJQ5zHQ 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.

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A pipe gushing polluted water into a river is an example of a _________________________ of pollution. A widely spread source of pollution that cant be tied to a specific point of origin is called __________________________.

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__________________ 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.

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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

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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.

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_____________________, __________________ 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.

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

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Solving pollution problems involves cleaning up exiting problems as well as preventing new ones.

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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.

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

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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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