Environmental problems

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Across
  1. 3. A lot of living trees on the line of the Equator.
  2. 5. A type of rainfall full of dangerous chemicals.
  3. 6. A piece of wood, chopped for fire.
  4. 9. Too much light coming out to space.
  5. 11. Big colourful bird, clever enough to be taught to utter human words.
Down
  1. 1. Too many chemicals getting into the ground.
  2. 2. The fact when a place becomes a desert.
  3. 4. Litter, garbage around the Earth in orbit.
  4. 7. Very big animal eating grass. Hunted for the horn.
  5. 8. The fact when enitre forests are cut down.
  6. 10. Poisonous gases coming out of cars.