And the pollution caused by the process must also be discussed.

But the government has done little to limit the pollution caused by industry.

You are responsible for any pollution caused by materials that come from your site.

When factories were built, it caused pollution that made all the trees look black.

But small companies, because there are more of them, can cause more pollution.

Our sources of energy are far from inexhaustible, and in any case they cause pollution.

Petroleum oil is toxic for most life forms and can cause pollution of the environment.

We cannot see the official tests showing which cars cause least pollution or have the best safety features.

But if they're using gasoline, don't hybrid cars still cause pollution?

This will help you to avoid causing pollution from escaped oil.