WATER POLLUTION

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Across
  1. 2. Something poisonous, or something very harmful or bad
  2. 5. A large natural stream of water flowing in a channel to the sea
  3. 7. A synthetic material made from a wide range of organic polymers
  4. 8. Unwanted or unusable material, substances, or by-products
  5. 9. Waste matter such as faeces or dirty water from homes and factories
Down
  1. 1. The surroundings or conditions in which a person, animal, or plant lives or operates
  2. 3. Chemical substances that are meant to kill pests
  3. 4. A sea is defined as a portion of the ocean that is partly surrounded by land
  4. 6. Involving or resulting from a reaction between two or more substances
  5. 7. Crude oil is a naturally occurring liquid found in geological formations beneath the Earth's surface