I bet a lot of people would take issue with someone saying "plantations are the solution." (That's a joke.)
Anyway, it's going to take concerted global effort to back it up to safe levels, to allow, for instance, Syrians to farm again, to restore global political stability through such restoration of the ability for people to feed themselves, but instead, the countries with the power to mount efforts on the scale required are going to argue about whether climate change is even happening, are going to continue focusing on fighting the people who western imperial powers are turning into desperate revolutionaries (through climate change, imperialism, expansion, globalization), are going to continue deploying bigger bases, more troops, more weapons, are going to continue to fight to secure more oil (and continue to poison peoples' water), are going to continue pissing around and building constituent-outrage about fucking national borders.
The Fucking Moron Right doesn't like to divert a dime from military spending, because "threats," but I guess total human existential threats don't count. $600 billion a year in military spending in the US alone could be used to secure humanity's future on the face of this planet. But it won't be. They'd rather increase military spending to fight threats that they continue to manufacture. (If you're in the US, the left there isn't the left, it is a milder form of the right.)
Capitalism is a failed experiment as a way of life and a way of organizing resources, and it is going to kill us. After that, the planet will be fine, so eco-warriors, don't worry. We may all die gasping, but life itself -- not complex intelligent life, but life -- always finds a way. In Butte, Montana, there is a former open-pit copper mine, Berkeley Pit, that dredged up a lot of toxic material to the surface. It filled up with rain water over time, and posed a severe threat to the local water table. Eventually, certain organisms, extremophiles, bacteria and fungi adapted to process all this toxic shit and thrive in it, were observed evolving there. Microbial life can do this everywhere that we poison the planet too much to sustain us. Life will continue, but not in the form of hominids of any kind, or any of the animals we eat, and probably not a lot of the plants we eat.
I suspect that a lot of rich people have some accelerationist agenda, and some kind of "escape hatch" in mind, and hope to whittle down the population of the world (which is NOT overpopulated, except when population is considered against the diminished capacity of the world to feed that population because of ecological changes brought about BY THOSE WITH THE AGENDA) through climate change so that they can have it all for themselves without popular resistance. They'll preserve themselves in luxurious climate-controlled facilities, feeding on choice hydroponic goods, until we're all dead -- it's not that much different than working in a climate-controlled office building that stays 72 degrees (F) year-round with not a degree of variance. They'll use the aforementioned extremophiles to clean up whatever they need. They'll harvest raw materials with the industrial technologies that we, the rest of us, the not-rich, invented and built and maintained, to feed their appetites for luxury goods of all sorts. Either we kill them and clean up their mess, then start living sensibly, stop overproducing shit nobody needs, or they'll kill all of us. They are killing us right now, whether they intend to or not. But I don't think they're so stupid as to actually, themselves, disbelieve that any climate change is happening. I think they know damn well, but it's important for them to control outrage and get people on their side -- people who will help their overlords kill them.