Delhi’s severe air pollution is leaving its stain on one of India’s most iconic monuments, with scientists warning that layers of black crust are forming on the 17th-century Red Fort and threatening its intricate carvings.
A study published in the journal Heritage says fine particulate matter and nitrogen dioxide in the capital’s air are accelerating the decay of the sandstone fort, built by Mughal emperor Shah Jahan and recognised by Unesco as a World Heritage Site.
