They were discontinued in 1938 because of pollution.
"We have no fish in these creeks because of pollution.
"People in large cities have lower life expectancy because of pollution.
Over the decades, the once pearly white building has been turning yellow because of pollution.
Many coral reefs, for example, have been dying off because of pollution and other human activities.
That fish is popular in many Asian countries, but it is declining in Asian waters, probably because of pollution.
Hotels and rentals filled up, beaches were not closed because of pollution and real estate prices stayed high.
Before World War II, Pittsburgh was known as "The Smoky City" because of pollution from the steel industry.
Because of pollution, lack of prey and disturbance from boats, their numbers have fluctuated in the past few decades.
In two of the province's rivers, 2,000 tonnes of fish died last year because of pollution.
BEFORE the Clean Air Act was passed in 1970 many Americans led shorter, sicker lives because of pollution.
