Industrial development of the valley consisted of several deep coal mines, but they were fairly small, and did not significantly pollute the river.

The mining operations caused to destroy the livelihood of people and pollute the river.

However, an accumulation of waste in the river from factories along its banks began to pollute the river.

Nobody ever pays for polluting the river.

They are settled near habitats and rivers, which most of time end up polluting the rivers also, especially underground waters and wells.