Photos: What Makes Our Roofs ‘Smoke’ In the Winter?
When it’s cold, smoke rising from city roofs is often picturesque, as in these photos from Mildred Alpern. But what exactly is that white gas?
Photos: What Makes Our Roofs ‘Smoke’ In the Winter?
When it’s cold, smoke rising from city roofs is often picturesque, as in these photos from Mildred Alpern. But what exactly is that white gas?