In the thick, filthy air the heroes could barely see where they were going.

The filthy air and ugliness of Belfast were far behind, and she felt better.

Their perfume pierced the filthy air, bringing back memories of lost times.

Gusts of filthy air drove through, and the floorboards below Maitland's feet were thick with dirt.

Irresponsible commuters force the rest of us to breathe filthy air, leading to illnesses and an overall reduction in the quality of life.

Some said it was worse than the filthy air of the southern cities.

For a time in the late 1930s and early 1940s, the city was considered to have the filthiest air in America.

For anyone who traveled to within a few miles of the area, the filthy air and blackened rivers were impossible to overlook.

They rarely get rattled about their filthy air.

Her chest was heaving as she strained at the hot, filthy air.