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The ganga and yamuna is mainly polluted due to tourists who goes there and people who are living there. The tourists who goes there and take baths pollute the water by throwing the waste things in that water and washes out the dirty water in it and ganga and yamuna is drained from same place and get divided.

The result of this pollution is an array of water-borne diseases including cholera, hepatitis, typhoid and amoebic dysentery. An estimated 80% of all health problems and one-third of deaths in India are attributable to water-borne diseases.

Pollution levels in the Yamuna River have risen. Biochemical oxygen demand (BOD) load has increased by 2.5 times between 1980 and 2005: From 117 tonnes per day (TDP) in 1980 to 276 TDP in 2005

EFFECT OF AIR POLLUTION ON TAJ MAHAL

Damage to Taj Mahal (made up of marble) is caused by acid rain. Acid rain is rainfall and other forms of precipitation with a pH of less than 5. It consists of acids such as sulphuric acid and nitric acid. It corrodes metals, marbles, slate, stone etc.

Many studies have proved that air pollution has an adverse effect on the beautiful white-marbled monument situated in Agra – Taj Mahal. Air pollution is causing a fast discoloration of Taj Mahal, changing the colour of its marbles from white to yellowish-brown.

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Yamuna pollution was identified as a threat to the Taj five years ago, blaming the formation of phosphorous in the river water for the breeding of insects whose excreta was leaving patches on the marbles.

Now, a new study offers a different perspective, identifying hydrogen sulphide emitted from the polluted Yamuna as more corrosive than sulphur dioxide that comes from industrial pollution that has been largely blamed for the decay in the Taj’s marble.

While this study to identify the principal corrosion agent was conducted on exposed metals in Taj premises over four years, the authors recommended similar experimentation on marbles for a 10-year-period for a definitive understanding.

Over the years, visitors to the Taj Mahal have been complaining of foul smell that’s ruining their experiences at the majestic 17th-century Mughal architecture listed as one of the New Seven Wonders of the World. The gas responsible for the odour may in fact be doing greater harm – it is likely the culprit behind the discolouration of the Taj’s glorious white marbles.

The stink coming from the black waters of the Yamuna river that flows prompted a group of scientists to explore if the gas that was responsible for the odour – hydrogen sulphide (H2S) – also had corrosive effects. They found that H2S released from polluted Yamuna water had a more corrosive impact than sulphur dioxide (SO2) released by industrial pollution in Agra city.

The findings assume significance, as initiatives around protecting the Taj from being affected by pollution have largely been concerned with tackling industrial and vehicular pollution, while Yamuna pollution has not got as much attention until five years ago.