Plantation forestry grows about 20 cubic meters per hectare-year [0]. Doug Fir weighs ~600 kg-m3 [1]. 3B US tons / (20x600 kg) per hectare-year = 6,796,166 hect

Plantation forestry grows about 20 cubic meters per hectare-year [0]. Doug Fir weighs ~600 kg-m3 [1]. 3B US tons / (20x600 kg) per hectare-year = 6,796,166 hectares. Plantation lumber is harvested in 7, 14, and 21 year cuts [0], so to ensure you're always sequestering enough carbon you need 21x6.8 million hectares of new forest to defray the current CO2 production... which is about 551,000 square miles, which is approximately [2] Texas + California + New Mexico... or [3] France + Spain + Italy. The new forest would still be ~20% of the size of the Amazon rain-forest though [4]. [0]: https://www.quora.com/How-fast-do-pine-trees-grow https://www.quora.com/How-fast-do-pine-trees-grow [1]: https://www.engineeringtoolbox.com/weigt-wood-d_821.html https://www.engineeringtoolbox.com/weigt-wood-d_821.html [2]: https://state.1keydata.com/states-by-size.php https://state.1keydata.com/states-by-size.php [3]: https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_area https://en.wikipedia.org/wiki/List_of_countries_and_dependen... [4]: https://en.wikipedia.org/wiki/Amazon_rainforest https://en.wikipedia.org/wiki/Amazon_rainforest