Millions of people in Delhi–NCR may soon be left without their natural shield against dust, heat and pollution. A new rule introducing a 100-metre height cut-off has put almost 90% of the Aravalli hills at risk, simply because most of these ridges are naturally low in height.
But these so-called “low” Aravallis are the ones that quietly perform the toughest jobs — blocking desert winds, trapping dust and PM2.5, cooling the region, and recharging groundwater for an already water-stressed NCR.
If these protective ridges are opened up for mining and construction, the consequences will be immediate and severe. Dust storms, toxic particulate matter and sand from the west will enter the NCR unhindered, pushing the region deeper into its ongoing air-quality emergency.
Source : @indianexpress Nov 27, 2025
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