1bn hectares on new forest and we’ll be ok say the scientists!
Certainly is a controversial study.
Here is an article that presents a very different view. https://www.carbonindependent.org/76.html
TLDR the estimate from carbonindependent.org is 6.8 Bn hectares needed. This is about half the planet.
Not that planting trees is a bad thing though. Planing trees is great . It’s just not going to to be a practical way to prevent climate change.