How will planting trees help our environment?

[FreeMan]

I have to answer this question for school "what you think YOUR neighborhood could do involving plants and trees and landscapes to better or enrich your community."

Well I had the ideas of carpooling so that we will pollute less gas into the air. And to plant more trees, but I don't know an explanation WHY planting trees would be helpful to our environment. 10 points for good answer!

[WinnieESewell]

Trees give off oxygen which combats CO2 in our environment, which contributes to depleting the ozone layer. Oxygen fights this and makes our air more breathable and healthy.