[ApplegateRanch]

Actually, they do both.

They ‘exhale’ O^2 during daylight; CO^2 at night. Generally, the younger they are, the greater the disparity between the two processes, though it “always” favors net O^2 production, while alive.

Living trees also contribute huge amounts of methane to the atmosphere; estimates range anywhere from 10% to 30% of annual atmospheric methane emissions.

[coconutt2000]

Thank you. I was wondering if anyone was going to post the general facts on plant CO2 and O2 production.

[Sherman Logan]

You are correct. I was referring to net effects.