>This does not seem logical. Two cars emit more C02 than one car. Two leaves will absorb more CO2 than one leaf. Mature trees grow much, much, slower. The wood

>This does not seem logical. Two cars emit more C02 than one car. Two leaves will absorb more CO2 than one leaf. Mature trees grow much, much, slower. The wood is (largely) the captured carbon so once a given species reaches a certain maturity, harvesting it for lumber to be used in construction and planting a several year old tree would be the most optimal. Some actually want to genetically engineer trees that grow much faster to do this (although faster growth generally means softer woods, but simply drying the wood and storing it in mines would buy you many decades to centuries before the bulk of the carbon was re-released).