Local water pollution from fertilizer runoff and factory discharge has killed large numbers of fish and made the river unsafe for swimming.

The light pollution from the downtown area made the Milky Way invisible to the naked eye.

The city's air pollution has contributed to a rise in respiratory illnesses among children.

Urban residents protested the constant noise pollution from nearby highways, demanding quieter roads and better sound barriers.

Scientists measured the concentration of air pollutants near the highway to assess public health risks.

When left unchecked, the chemical pond self-pollutes, creating hazardous fumes that alarm nearby residents.

Every summer, the pond kept self-polluting despite the community's cleanup efforts.

Urban factories, often labeled as self-polluters, have been pressured to adopt cleaner technologies.

The self-polluter left toxic runoff on his fields that eventually ruined his harvest.

Conservationists warned that genetic pollution from escaped farmed salmon threatens the integrity of wild populations.