You speak about deforestation in the US, but there are more forests in the United States now than there were at the time of the Revolutionary War.
I did mention the southeastern U.S., because burning wood for fuel doesn't help the global situation, no matter where it's done, even if there's more forest elsewhere in the particular country where it's harvested.
You say that like we couldn't just let them starve. If their descendants are going to be wiped out by global warming anyway what's the difference?
Even sterilization might not be quick enough.
Obviously, neither is acceptable from a humanist perspective.
Actually, now that I've read your comment closer, I noticed you mentioned serialization. Do you mean digitizing people's minds and killing them afterwards?
We might also want to stop clearcutting vast forests in the Southeastern U.S. to ship wood pellets to Europe, which burns them.
Then we'd have to save the rest of our existing forests, many of which are struggling due to various effects of climate change, including heat stress, drought, topsoil loss, disease, and forest fires. Many large forests are net carbon emitters now.
After we've done all that and finally stopped losing trees, we can think about having more trees. We'll need space for them, so that means reducing agricultural area even more. We've been emitting about ten billion tons of carbon every year for quite a while, so it's going to take a lot of land.
We're also running out of fish in the ocean, so with that food source going away we're going to need more from agriculture than we get now.
"Just plant trees." Like many, perhaps even most purported climate change solutions, it sounds great until you work out the scale.