Walk through any city, and you'll encounter Nature-based solutions (NbS) everywhere: urban parks providing respite from hot streets, wetlands filtering stormwater, and trees along busy roads reducing air pollution, among others. This green infrastructure, however, is often viewed through a narrow lens—as mere providers of shade, picturesque spaces, or recreational spots.  This limited perspective has harmful consequences. When development pressures mount or budgets tighten, these natural assets become expendable and are often removed without proper analysis of their multidimensional benefits. This is where quantifying the benefits of NbS becomes essential. By measuring and monetising the value these solutions provide, we…

When the northeast monsoon hits Chennai, a foreseeable result of the heavy downpour is severe flooding in several areas, including Porur Lake. As residents living near this 200-acre water body battle inundation every year, our team set out to investigate the root causes of flooding using available data. Environmental issues have often been dealt with a one-size-fits-all approach, but our study aimed to provide specific solutions tailored to the Porur catchment area. For this, we mapped inundation patterns, land gradient, land use change and the outlay of stormwater drains (SWDs).   At a recent datajam organised by the Oorvani Foundation…