Dining alfresco beckons, against the odds of bus exhaust and steam from subway grates.

It was only 9 o'clock, but the air was gritty with bus exhaust.

"I think the bus exhaust is worse than the mosquito spraying," said Steven van Leeuwen, who lives on West 85th Street.

Auto, truck, or bus exhaust from attached garages, nearby roads, or parking areas can also be a source.

The air had the taste of bus exhaust mixed with saccharine.

Mixed with the smell of bus exhaust and hot tar was a delicate perfume, warmed off the tiny yellow blooms of a bush near the walk.

The air is replete with the rich odors of vomit, cleaning solvents and bus exhaust.

The bus exhaust smelled awful.

All I got was a lungful of bus exhaust.

On the upside, that yummy aroma of freshly cut grass would counter the ambient scents of bus exhaust and ripening refuse.