[ASA Vet]

that caused more trees to grow, which sucked up the CO2

Which sucks up more CO₂ and puts out more O₂?
An acre of trees or an acre of grass land.

[norwaypinesavage]

"Which sucks up more CO2 and puts out more O2? An acre of trees or an acre of grass land."

The lore is an acre of trees. I don't buy the lore. My bet is that if you calculated the square inches of chlorophyll exposed to the sun, you would find little difference.