[jackdeansmith]

As far as nature based solutions go, this study on the potential for afforestation is a good place to start: https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14887/. Simply put, there isn't enough land to plant enough trees to get us out of this mess. That doesn't mean that planting trees isn't useful, I think the paper makes a good case for why it's cost effective and buys time, but it isn't enough alone.

My personal take is that the cheap carbon credits are indeed a more cost effective use of money right now, but it's low hanging fruit that we will run out of soon.