y is greenery (trees & plants) important for our world to exist?

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By shinning_stars

@shinning_stars (325)

India

November 11, 2006 2:18am CST

for oxygen

2 responses

@RieRie (820)

•

12 Nov 06

Yup for oxygen without it we'd die, we breathe out carbon dioxide so plants can breathe and they breathe out oxygen so that we can breathe.

@ishtar_celtic (51)

• India

12 Nov 06

gases n shade