I've been to Chicago...It wasn't chocholate I was smelling.
Why doesn't the EPA walk around the streets and take on the more offensive smells which seem to eminate from the city utilities? (If you catch my drift).
Funny thing--I was in Vegas and noticed the same big city scent. After 4,000 years of civilization you would think that we could solve the CH4(g) + 2 O2(g) problem.
