In 2015, when her infant daughter began wheezing, Subashini R purchased a machine she had only ever seen in hospitals. Daily trips from Kattukuppam in north Chennai to Tondiarpet Hospital were expensive, costing at least ₹500 then. Although the nebuliser cost four times her daily healthcare expenses, it reduced long-term costs in a region struggling with the lasting effects of pollution. “Every doctor tells locals to leave the region due to the chemicals here,” says the activist, part of the Save Ennore Creek Campaign. A decade later, nearly every household in Ennore has a nebuliser. Her younger daughter now suffers…

The Cooum River, once a sacred river that shaped the history of Madras, has now become a sad sign of urban degradation. For the millions of residents in Chennai, it has transformed into a malodorous, polluted, and stagnant channel, burdened with solid waste accumulation and extensive encroachments along its banks. During a recent datajam organised by Oorvani Foundation and OpenCity, we used Geographical Information System (GIS) datasets and population analytics to investigate the underlying causes contributing to this crisis. The results show that rapid urbanisation, inadequate provision of essential civic infrastructure, and the absence of coherent policy frameworks, along with…