OK, I see where the logic is that the CO2 released by burning wood is only equal to the CO2 it sucked up while it was alive. I view this as a loophole, a technicality to make an excuse for an otherwise unhealthy situation. The smog and smoke still make even the most efficient wood furnace a bad idea. This might be ok in rural areas where the net impact per square mile is minimum. It simply is not a viable solution for urban areas. Also, there is no way we could grow trees fast enough to replace all the coal, oil, and natural gas heat with wood burners!'
Oil is running out, and the sooner we all accept the fact that the solution is Nuclear, the better!