Good deeds

1234567
Across
  1. 2. Too precious as its portable form is in paucity
  2. 4. To reduce trash
  3. 5. Makes our world green
  4. 7. The need of the hour
Down
  1. 1. A colour that represents our environment
  2. 3. A kind of prize which gives the maximum smile
  3. 6. A green thing that rhymes with number three