21.   Only uncontaminated material was to be placed there as a cap over the polluted area.

22.   Past research has found that children living in polluted areas have higher rates of lung diseases such as asthma.

23.   Although Mexico City is more polluted than U.S. cities, the results can be generalized to other polluted areas, Fordham said.

24.   Cleaner-burning reformulated gasoline is required in one-third of the country in heavily polluted urban areas.

25.   Consumers are afraid of contamination, even though the fish come from outside the polluted area.

26.   Cleaner burning reformulated gasoline is required in one-third of the country, in heavily polluted urban areas.

27.   Ramos said the mine would remain closed until the company compensates property owners and cleans up polluted areas.

28.   Some poisoning cases have involved poisonous mushrooms mistaken for edible ones and some of the victims gathered edible mushrooms, but in polluted areas.

29.   Some poisoning cases have involved poisonous mushrooms mistaken for edible ones and some of the victims gathered edible mushrooms, but in badly polluted areas.

30.   The area was cleaned up under the federal Superfund program that allocates money to clean up badly polluted areas.