A recent study published in the journal Nature has suggested that older trees grow faster, and consequently absorb more cO2 from the atmosphere. The study found that trees grow seemingly indefinitely, and as they mature the rate ate which they absorb c02 increased accordingly. This challenged the prevailing assumption that young trees are more effective in absorbing cO2 and could have long term considerations on forest management, casting doubt on the current doctrine of constant tree rotation.
A more detailed look at the report is available at The Ecologist.