The problem is that those wood chips don't just ship themselves across the Atlantic. There is a significant carbon footprint associated with logging, processing

The problem is that those wood chips don't just ship themselves across the Atlantic. There is a significant carbon footprint associated with logging, processing, and transporting all that biomass before you even get to burning it. There is also, potentially, an opportunity cost in burning forests that could otherwise be acting as long term carbon stores (either leaving the trees intact, or harvesting their timber for something where the carbon will be stored longer term, such as construction/housing).