>Also remember that even one single Barbecue grill or wood-fired stove/fireplace (even the "green" pellet-based ones) emits more of the pollutants in question t

>Also remember that even one single Barbecue grill or wood-fired stove/fireplace (even the "green" pellet-based ones) emits more of the pollutants in question than a thousand of these cars. So maybe a little perspective may be in order... If we we're talking about the same study, the 1,000 cars thing is talking only about particle pollutants not C02 and NOX. Also that study had to tweak the numbers a bit to get to 1,000 cars. They said that wood burning stoves produce 150g of particle pollutants per 4 hours. While new cars only produce 0.15g per 30 kilometers driven. A car will normally drive much more than 30 kilometers in 4 hours. >(even the "green" pellet-based ones) A quick look here http://www2.epa.gov/residential-wood-heaters/fact-sheet-summary-requirements-woodstoves-and-pellet-stoves http://www2.epa.gov/residential-wood-heaters/fact-sheet-summ... shows that as of this year all residential wood heaters have to emit no more than 4.5g of particle pollutants per hour. So either all new wood burning stoves are illegal or you can in fact buy "green" wood burning stoves that produce way less particle pollutants per hour than 1,000 cars. Edit: This link http://www.burningissues.org/comp-emmis-part-sources.htm http://www.burningissues.org/comp-emmis-part-sources.htm Shows that the average pellet burning, (and even EPA certified) wood burning stoves release much, much less than 150g of particle pollutants per hour.