More than 200 rivers around the world have been analysed to reveal the water quality and what lurks beneath the surface.
The Ganges is India's most sacred river but suffers from severe pollution. High levels of fecal coliform bacteria, industrial ...
Otters are sensitive to water pollution, making them reliable indicators of water quality and ecosystem health.
The cities with the worst air pollution in North America were Ontario, Bloomington and Huntington Park – all in Southern ...
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