environmentalists

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Across
  1. 3. when it rains, the water gathers in ...
  2. 4. a very difficult situation
  3. 5. to make sth. smaller by force
  4. 8. related to nature
  5. 12. to chop down an entire forest
Down
  1. 1. the opposite of war
  2. 2. sth. that stores enough water for entire cities
  3. 3. 'to see', 'to hear', 'to watch' are verbs of that type
  4. 6. If sth has happened not to long ago, it happened...
  5. 7. to turn sth. back to the way it used to be
  6. 9. to gather information about sth.
  7. 10. if sth. is simple and works very well
  8. 11. what cars burn in their engines