Delhi’s Red Fort losing its colour: Study links blackening walls to toxic air pollution

Oct 6, 2025 - 07:45
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Delhi’s Red Fort losing its colour: Study links blackening walls to toxic air pollution
Delhi’s Red Fort is turning black — and air pollution is to blame. A joint Indo-Italian study found that toxic pollutants in the capital’s air are forming “black crusts” on the monument’s red sandstone walls, threatening both its beauty and structure.

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