The folks I worked with, NCX, deal in timber carbon credits. In this case, forest parcels are graded using aerial technology which allows them to determine the number of trees, the height and diameter of each, and species. From that information, they assign the number of “harvest deferral credits” you are permitted to offer for auction. I ended up 99 “credits” which they would auction off on a given date. I set my minimum acceptable price at $8.00 per credit. If the price the “buyers” were willing to pay did not reach this level, my credits would not sell and I get nothing. As it happened, the price at auction reached $12.00 per credit and that is what mine sold for. From what I can see, no one is going to get rich, but it does offset some taxes. You get paid at the end of the deferral period (12 mos.) There are other companies similar to NCX, but they are the ones I worked with.