Monculture only convert about half the Co2 that a real forest would.

I don't know. But maybe it should be word of the week, month, year or decade given that the concept seems to not have been stressed enough in education and people constantly miss the issues created by monocultures, wether it's soil damage, higher need for fertilizers, susceptibility to diseases or parasites (reqiring again more chemicals) or the simple fact that plants for monocultures are rarely chosen based on perfect climatic conditions (so even more at risk with changing climate). Ffs... regarding trees in particular the ones planted are often just picked for their straight trunks, so the wood is easier to sell later...