Yeah, that is the bit that stuck out as wrong to me as well. For most wind directions, there aren't any nearby buildings downwind of my chimney. Wood burning isn't so common in the city, where I suppose it could be true that most of the smoke finds its way into someone's house.
For an article that uses the word "scientific" so often it's remarkably imprecise. We're told that "there is no amount of wood smoke that is good to breathe", but there's no effort at all to quantify how bad it is. Children who live with wood stoves have higher incidence of asthma... okay, I can believe that. It doesn't mean anything until you give at least a little indication of approximately how much higher.
