Pollution+of+the+lakes+Per+6

One of the pollution is **Runoff** which means that the water not absorbed by soil-travel over the ground, picking up **pollutants** from soil, and into lakes and rivers. Old toxic waste also poisons that end up into lakes, rivers and oceans. Pollution from the air also damages waterways. Canada and the U.S are working together to pass laws to save the environment. Cleaning up the lakes is really costly and difficult. People never worried about the great lakes pollution or ecosystem. people didn't think that we could pollute big water areas. By the late 1990's people started to notice clear signs that the lakes were in danger. Between the 1960's and 1970's the states of the great lakes were worried about the lakes pollution.the first step in the big clean up activity between the u.s and Canada came from the **point-source pollution.** by the 1991 lake Erie improved so much after it that some laws became strict and banned the use of the number of **toxic chemicals**.
 * **__point-source-pollution:__** water pollution from a single place
 * __**toxic chemicals:**__ a chemical that is poisonous to humans or any living things
 * __**none-point-source-pollution:**__ pollution that doesn't come a single location.
 * **__runoff:__** water from rainfall that does not go into soil or plants but into water drains and lakes
 * **__pollutants:__** something that pollutes or damages air, soil or water
 * __**sediment:**__ bits of soil left in a place by moving water

1. When did the U.S and Canada become worried about the great lakes pollution?

A.1999 B.1870 C.1972

2.What is point-source pollution?

A. a toxic chemical B. a nontoxic chemical C. pollution from a single source

3.What are the 2 nations that are working together to clean up sediments?

A.Canada & Mexico B.Canada & U.S C.Canada & Mexico