Two decades ago, Gandhi Nagar in south Chennai was a shaded green canopy, recalls Meera Ravikumar, a resident. “Now, in the name of development, many incidents of tree felling have occurred in the past 15 years on avenues and across private properties. In highly populated and polluted urban areas, green lung spaces are important,” says the member of Swacch Gandhi Nagar, a citizens group. Since 2000, India has lost 2.33 million hectares of tree cover, according to the 2024 Global Forest Watch. Tamil Nadu has fared better than most states — its forest cover has remained “largely stable” since…