People and the Environment

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Across
  1. 5. resources / Materials or substances occurring in nature which can be exploited for economic gain.
  2. 6. effect / An increase in the amount of carbon dioxide and other gases in the atmosphere, that is believed to be the cause of a gradual warming of the surface of the earth.
  3. 10. / Many countries are now researching ways to protect it.
Down
  1. 1. / The process of making air, water, soil, etc dangerously disty and not suitable for people to use.
  2. 2. trees / Way of cleaning the land.
  3. 3. pollution / Pollution of the air
  4. 4. / The practice or science of farming
  5. 7. / The loss of rain forests changes the world's air and...
  6. 8. rain / Produced by chemicals in the air
  7. 9. / It is formed when polluted air mixes with fog.