One of the claims in the video is that: If all of the trees in the United States (I think) were burned in these plants that it would power the United States (I think) for one year (I'm sure). Given that it takes more than 1 year to regrow all of the trees it seems like a foolish decision.

Apparently some of the plants also choose/have to incinerate vulcanized rubber (tires) to burn green/wet lumber.

Frankly, just using the documentary as my reference, this seems like an awful scheme and I can't fathom how subsidies and policy supported this technology.