1.   Could this be the answer to preventing pollution on difficult terrain?

2.   Preventing the pollution of drinking water by untreated human excrement, for example, has long been recognised as a basic health concern.

3.   This continues, but at least now efforts are also being made to prevent further pollution and even repair some of the damage.

4.   We must act to prevent pollution in the first instance.

5.   Care will be required to prevent pollution of the burn.

6.   The all-party Public Accounts Committee of the House of Commons has called for stricter regulations to prevent pollution by oil and chemical spills at sea.

7.   The convention, signed by the six states bordering on the Black Sea in April, aims to prevent further pollution and reduce current pollution levels.

8.   AN environmental group is demanding action from the National Rivers Authority to prevent further pollution of the Dee estuary.

9.   Another would effectively prevent the Environmental Protection Agency from issuing or enforcing regulations to prevent pollution.

10.   A lot can be done in a watershed to prevent pollution and restore natural conditions.