President Clinton has set the level to 65 micrograms per cubic meter for a 24 hour standard. Woodsmoke contains a chemical brew of toxic and cancer-causing materials. Woodsmoke damages the health of young, old, active, and chronically ill. It harms your neighbors and negatively affects the environment. It costs two to four times more to heat with wood than by other methods such as gas, propane, or oil, combined with proper insulation and conservation techniques.
Pellets are the most expensive fuel available.
Wood is not inexpensive even if your wood is free. Cancer, heart and lung disease, immune diseases, eye degeneration, chronic upper respiratory infections and death are all very expensive.