21.   Air pollution causes cancer and lung disease and may be reducing male potency, the U.N. officials said Monday.

22.   Japan and South Korea have in the past complained to Beijing of acid rain caused by pollution from China.

23.   Medical witnesses at the trial have debated whether pollution caused any of the deaths.

24.   More recently, pollution caused some of the painted surfaces to crumble away.

25.   Most of the destruction is caused by pollution, increases in sea temperatures due to global warming and coral harvesting for medicine and decorations, they said.

26.   New research on fossil algae from an Antarctic lake supports indicates that global warming is being caused by pollution, University of Tasmania researchers said Monday.

27.   Norwegian scientist Lars Walloe said, however, that an IWC scientific committee concluded that pollution causes little harm to baleen whales.

28.   The group also disputes scientific evidence that pollution causes global warming.

29.   The ozone destruction is caused by pollution from compounds containing chlorine or bromine.

30.   The pollution can cause health complications among young children, the elderly and people who suffer from heart conditions or lung problems.