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__________ such as detergents, pesticides, oil and other chemicals makes the water contaminated. (POLLUTE)

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We are all beginning to experience __________ due to the enhanced greenhouse effect.

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Organic farmers don't put chemicals into the soil, but keep it __________ by growing clover and adding manure. (FERTILIZE)

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__________ is a result of dumping plastic or other inorganic waste in the ground.

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__________ are working to improve the quality of our lakes and rivers. (ENVIRONMENT)

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Environmental pollution __________ human activities on the earth.

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There have been laws against __________. (FOREST)

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__________ is a chemical used for killing insects to help the plants grow well.

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Rocks and metals are __________.

(ORGAN)