Im no expert.but I think the peat you have dug and burn has been storing carbon for 1000's of years that was essentially out of the loop so to speak.
If we burn tree's that have captured carbon then by burning them we ain't adding any more carbon to the atmosphere as what the trees have taken in we are releasing again.and it's an endless cycle of capture and release by burning tree's.oil gas coal peat.is adding carbon to the atmosphere that was captured millions of years ago.
I might be wrong but I'm sure it's along them lines...