Less meat more green

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Across
  1. 5. noun: advantage
  2. 6. verb: it is used with 'to', meaning leads to
  3. 7. adj.: harmful
  4. 8. adj.: worried
Down
  1. 1. verb: to help something to develop or increase
  2. 2. noun: sudden accidents which cause great damage or suffering
  3. 3. adj.: much more than is reasonable or necessary
  4. 4. verb: tries to judge the value, size etc. of something, without calculating it exactly
  5. 9. verb: showed that something is definitely true, especially by providing more proof