The name given to people who make rivers dirty are called polluters. More specifically they could be called water way polluters or simply river polluters.
Polluters.
One to Grow On - 1982 Noise Polluters was released on: USA: 1987
Australia had a carbon price, paid by the big polluters. However, a new government wants to scrap that scheme and move to one where they pay the polluters to reduce their emissions.
Humans are the largest polluters in ecosystems.
Green plants are not polluters. They absorb carbon dioxide and release oxygen (a good thing), remove pollutants from air (a good thing), fix nitrogen into nitrates (a good thing)
Americans, they are the greatest polluters in the world.
Point Source Polluters
People who live in eastern Europe and cause alot of pollution. :L
Individual polluters must process their effluents.
Cars are big polluters. Books are helpful tools when researching different topics.
smog, fog, smoke from a fire