11.   With more and more cars on the road, pollution levels are rising steadily.

12.   The conference passed a resolution calling on western governments to cut pollution levels.

13.   Environmental organizations suggest that motorists get together and carpool to avoid adding to pollution levels.

14.   Water pollution levels are also alarmingly high.

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

16.   People who already have breathing problems are badly affected if pollution levels are high when they come into the city centre.

17.   All four district councils in Cleveland have pledged to provide monitoring data relating to air pollution levels in their areas.

18.   Jim Skinner said a planned review of bus routes could be modified to take account of air pollution levels.

19.   The aim is to relate pollution levels before and after the changes to health statistics.

20.   Although people with chronic lung disease suffer most, high pollution levels can affect anyone.