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.
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.