More than 1,000 trees to be cut. Close to 100 bird species and 400 plant species endangered. All this for a project that covers just about two kilometres and costs a whopping ₹1,140 crore. Residents and activists in Bengaluru have vehemently opposed the Karnataka government's Hebbal Short Tunnel project, launching a petition to halt construction immediately. Environmental activists and experts warn that the project threatens Bengaluru's cascading lake system and increases flooding risks. There is growing public concern that the tunnel will cut through one of North Bengaluru’s last major green-blue landscapes and cause lasting environmental damage. The petition, started…

Since Bengaluru’s lakes were formed by damming water flowing down valleys, they are typically wedge-shaped, with a gentle slope and a deep basin towards the embankment. This promotes the growth of diverse vegetation and animals, each adapted to a particular water depth. The result is a natural zonation – reedbeds and shoreline vegetation at the edges, floating and submerged vegetation in the middle, and open water at the deepest end. During the Open City biodiversity datajam held in December 2025, our group examined the ecological trends around Bengaluru’s lakes. In an earlier article, we examined how migrant and resident waterbirds…