civics
World Heritage Site Taj Mahal Cast in the Shadow of Air Pollution: Chemical Reactions Eat Away at the White Marble
Related terms: 世界遺産 大気汚染 酸性雨 CaCO₃ インド 持続可能な社会
Key points (reviewing AI explanation)
The Taj Mahal, a World Heritage Site in Agra, India, is facing a crisis of preservation due to discoloration and deterioration caused by air pollution. In recent years, the surface of the white marble has turned yellow, green, and brown, and the cause is attributed to NOx, sulfur oxides (SOx), and particulate matter (PM) originating from nearby factory emissions and vehicle exhaust. India's Supreme Court has ordered factory regulations and a shift to electric buses.
The Taj Mahal is a mausoleum built over 22 years starting in 1632 by Shah Jahan, the fifth emperor of the Mughal Empire, to mourn the death of his beloved consort Mumtaz Mahal. It was registered as a World Heritage Site in 1983 as an "architectural jewel" that fuses Islamic, Persian, and Indian styles. It is a leading tourist destination in India, visited by 6 to 7 million people annually, and is also a source of foreign currency income.
Acid rain (in which NOx and SOx react with rainwater to form HNO₃ and H₂SO₄) reacts with the calcium carbonate (CaCO₃) in limestone and marble, causing dissolution and decay (CaCO₃ + H₂SO₄ → CaSO₄ + H₂O + CO₂). This chemical reaction is a real-world example of cultural property being eaten away, and protecting cultural heritage and countering air pollution have become inseparable issues.
Balancing the protection of cultural heritage with economic development is a dilemma faced by many countries. The Taj Mahal is also "a treasure shared by all of humanity." If you were a policymaker, think of concrete measures for how you would balance the protection of a World Heritage Site with the lives and economy of local residents.
Explanation
The Taj Mahal, a World Heritage Site in Agra, India, is facing a crisis of preservation due to discoloration and deterioration caused by air pollution. In recent years, the surface of the white marble has turned yellow, green, and brown, and the cause is attributed to NOx, sulfur oxides (SOx), and particulate matter (PM) originating from nearby factory emissions and vehicle exhaust. India's Supreme Court has ordered factory regulations and a shift to electric buses.
The Taj Mahal is a mausoleum built over 22 years starting in 1632 by Shah Jahan, the fifth emperor of the Mughal Empire, to mourn the death of his beloved consort Mumtaz Mahal. It was registered as a World Heritage Site in 1983 as an "architectural jewel" that fuses Islamic, Persian, and Indian styles.
Acid rain (in which NOx and SOx react with rainwater to form HNO₃ and H₂SO₄) reacts with the calcium carbonate (CaCO₃) in limestone and marble, causing dissolution and decay (CaCO₃ + H₂SO₄ → CaSO₄ + H₂O + CO₂). This chemical reaction is a real-world example of cultural property being eaten away, and protecting cultural heritage and countering air pollution have become inseparable issues.
Balancing the protection of cultural heritage with economic development is a dilemma faced by many countries. The Taj Mahal is also "a treasure shared by all of humanity." If you were a policymaker, think of concrete measures for how you would balance the protection of a World Heritage Site with the lives and economy of local residents.
Source: news.google.com