You are obviously referring to trees. So assuming that's what you mean: that won't work.

https://climate.mit.edu/ask-mit/why-dont-we-just-plant-lot-t...

Trees quickly reach equilibrium at which point CO2 out equals CO2 in. While they can sequester some CO2 while growing, they also generally cause an albedo increase (forests trap heat). So, for arguments sake, the opposite would actually help more: destroying forests reduces albedo reducing the planet's heat uptake, while not releasing most of the CO2 in the atmosphere, in fact, that causes it to get flushed into the ocean and it won't come back for millenia at least. Despite appearances, forest fires actually help against global warming. But not much.

In other words: right now to merely pause global warming we'd have to stop 99.7% of CO2 usage. If every square meter of the planet was covered in forests, merely to stop global warming from getting worse every year we'd have to stop ... 99.7% of CO2 usage (maybe 98% would do for 2-3 years while the trees are growing). And that's disregarding the massive albedo increase.

Also, global warming is causing massive forest expansion worldwide ... and that's making global warming worse, not better. If countries started destroying the many forests that have grown since 1900, that would help.

You want a suggestion that would actually do something? Seeding the oceans would help. It would mean global warming can be paused by a mere drop of 92% of fossil fuel usage, a big increase, at the cost of a HUGE loss of oceanic biodiversity. So I hope it's clear that while that is a far better suggestion, it is very far from a solution, and doesn't come without costs. Besides, if the climate warms further, my bet is that the oceans will "seed themselves" more and more.

I'm sorry to repeat, but no: the planet will not help us and stay static and stop warming (or even go back to normal warming) if we just "stop destroying nature". And building a few parks in cities, like it seems your real suggestion is, will do nothing at all.

> the oceans will "seed themselves"

Yes they already do, as evidenced by the sargassum that wrecked this season for Florida and Mexico.