Environment

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Across
  1. 5. a gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space
  2. 8. an increase in the amount of carbon dioxide and other gases in the atmosphere which is believed to be the cause of a gradual warming of the surface of the Earth
Down
  1. 1. able to decay naturally and harmlessly
  2. 2. a layer of oil that is floating over a large area of the surface of the sea, usually because an accident has caused it to escape from a ship or container
  3. 3. the general weather conditions usually found in a particular place
  4. 4. damage caused to the environment by harmful substances
  5. 6. a long period when there is little or no rain
  6. 7. to sort and collect rubbish in order to treat it and produce useful materials that can be used again