Yes, in the long term. Pollution from woodburners, however, is negligible compared to driving, flying, generally living your life - and like I pointed out - the single most environmentally damaging thing you can do to the planet is having numerous children. And it's usually people shouting the loudest about the environment are those with several children, ferrying them around to school and play dates in big cars and taking them on foreign holidays. Probably having bonfires too and fireworks, real Christmas trees, wrapped presents, countless plastic toys etc, etc, cause it's fun for the kids! And they're not going to give that up, are they? Yet, others are made to feel guilty for burning a bit of wood in the winter to keep the house warm. Don't get me wrong, I'm all for the environment, and I try to do my bit - I just can't stand hypocrisy!