The plant also was a major source of pollution, another key issue brought to light in the late 1960s.

This has become a primary source of pollution for the river.

In that 23-square-mile area, there are no point sources of pollution.

Close to sources of pollution, it will take longer to meet the environmental quality standards.

"New Jersey is also a source of pollution," he added.

Both mines were significant sources of pollution on the creek.

Learn about the various sources of pollution that affect our nation's waters.

They set standards for sometimes specific sources of pollution like automobiles.

Known dumping into the ocean is also another point source of pollution.

In urban planning, sound is usually measured as a source of pollution.

But he said the nation still had a long way to go in halting other sources of pollution.

Agricultural runoff was and is another potential source of pollution.

The use of oil for energy is also known to be a large source of pollution.

It will address all relevant sources of pollution, including industrial activities.

Agriculture runoff is not the only source of pollution in the lake.

The association identified another source of pollution that has many people concerned: the salmon.

Environmentalists view many as major sources of pollution, and several have been forced to shut down.

This, then, was almost certainly not the source of pollution, in which case, he must have been following the wrong underground stream.

Until the 1980s this creek was neglected and a major source of pollution for the lake.

During the 1970s many sources of pollution were removed, and water quality gradually improved.

We have two large point sources of pollution in our sewage-treatment plants.

Yet another source of pollution adding to the risk.

However, with careful use and by reducing sources of pollution, ground water can continue to be an important natural resource in the future.

Ecosystems in and around the urban center are especially influenced by these point sources of pollution.

Some scientists say innovation can eliminate the main source of pollution in a generation.