Campbell wanted to be provide cleaner, brighter amenities which were a contrast to the dark, dirty environment that existed previously.

A 'Critical Element' The cost will likely be a dirtier urban environment, civic groups and even city officials say.

McCain spent six weeks in the hospital, receiving marginal care in a dirty, wet environment.

Also in dirty environments the oil can become contaminated with dust or debris that increases friction.

It is, 'Can you whip this incredibly difficult, long, dusty, dirty environment?

Potentiometers which are seldom adjusted, especially in dirty or harsh environments, are most likely to develop this problem.

However they may be helpful if a piercing contacts a dirty environment.

But it's a dirty environment out round Jupiter, and our normal cruise speed is several thousand klicks - a second!

Our observations have shown that the near-humans live in a dirty, dangerous environment.

But let's not blame cows for a dirty environment.