Places   (Help with places, streets and buildings in Wigan.)

Indeed, you're right there Peter! I never gave it a thought when I bought the house. But .... there's little sample filters situated on lamp posts all around. They change them every now and again, obviously checking air pollution.
That said, the fumes get everywhere and they're dangerous!

From THIS

"Automobile exhaust accounts for the largest source of benzene in the general
environment."