Its clean sands have become dark and dirty.

What snow remained from the storm had become slushy and dirty, but that didn't discourage him.

Light rail was imperative, the group determined; the city's air was becoming so dirty that it would soon violate federal health standards.

However after only eight years the gravestone had become dirty and partially eroded again.

He also takes care to hang her dress on a bush, to prevent it from becoming dirty.

This keeps the salt from coming into contact with the silt beneath and becoming dirty.

On top of everything else, the game had become dirty.

A thick cable led away to a voltage converter at the side of the cellar, but the box itself had become dirty and rusty.

The beach needs serious attention and consideration of the city government, as the area has become increasingly dirty and unpleasant.

Although visibility increased from far distances with the yellow, it was flawed with easily becoming dirty after a few months.