how do trees give us oxygen

Question: how do trees give us oxygen
- Keywords:
  oxygen,
  photosynthesis,
  tree
Asked by botter7r2 to Drew on 14 Jun 2011.
- Drew Rae answered on 14 Jun 2011:
  
  Hi Botter7r2. The leaves of plants collect energy from the sun using a process called photosynthesis.
  This process takes water (from the ground) and carbon dioxide (from the air) and energy (from the sun). It gives out sugar to feed the plant and oxygen as a waste product that goes back into the air.

Question: how do trees give us oxygen