Atmospheric carbon per area is about 1 kg/square meter. (x) It's not inconceivable that trees could store roughly similar orders of magnitude of carbon per are

Atmospheric carbon per area is about 1 kg/square meter. (x) It's not inconceivable that trees could store roughly similar orders of magnitude of carbon per area. x: 0,3 * 5e18 * 400/1e6 / (7000000*7000000*4*3,14)