Yes, each tree individually only temporarily stores carbon until it is eventually burned or rotted. But if trees are being replanted at a rate that CO2 in is eq

Yes, each tree individually only temporarily stores carbon until it is eventually burned or rotted. But if trees are being replanted at a rate that CO2 in is equal to CO2 out, it's essentially a permanent storage when you look at the full system. Additionally, if you increase the total number of trees in the system, your storage increases, which is reducing the amount of CO2 in the air. Even if this isn't the end-all-be-all permanent solution, it certainly helps in the short term.