NEET BIOLOGY

Detailed explanation-1: -Europe’s second longest river, the Danube, is being polluted by unfiltered wastewater from Serbia’s capital Belgrade.

Detailed explanation-2: -Water pollution is the contamination of water sources by substances which make the water unusable for drinking, cooking, cleaning, swimming, and other activities. Pollutants include chemicals, trash, bacteria, and parasites. All forms of pollution eventually make their way to water.

Detailed explanation-3: -The main types of water pollution include groundwater pollution, surface water pollution, suspended matter, oil spillages, microbiological pollution, chemical water pollution, thermal pollution, and oxygen-depletion pollution. All of these can cause pollutants and contaminants to enter our waterways.

Detailed explanation-4: -Chemical waste products from industrial processes are sometimes accidentally discharged into rivers. Examples of such pollutants include cyanide, zinc, lead, copper, cadmium and mercury. These substances may enter the water in such high concentrations that fish and other animals are killed immediately.