The Green Cost of Metro: Phase 3’s Trees and Bengaluru’s ₹43-Crore Plan

Every kilometre of new metro comes with a quieter, harder question: what happens to the trees in its path? As Phase 3 moves toward construction, Bengaluru is weighing the green cost of its transit ambitions.

How many trees are affected

For Corridor 1’s first package — JP Nagar 4th Phase to Mysuru Road, a 10.88-km stretch — BMRCL has secured permissions to remove or translocate around 1,100 trees. Across the corridor, the number of trees impacted has been brought down from an initial 11,137 to roughly 6,700 through design changes and translocation.

That reduction matters in a city already anxious about its shrinking green cover and rising temperatures.

The ₹43.53-crore environmental plan

To offset the loss, BMRCL has proposed compensatory afforestation under a ₹43.53-crore environmental monitoring plan. The idea is to pair every felled or translocated tree with new planting and long-term monitoring, so the city’s canopy isn’t simply traded away for concrete.

Translocation — physically moving mature trees rather than cutting them — is increasingly part of the toolkit, though survival rates depend heavily on aftercare.

Balancing transit and tree cover

There’s a real tension here: mass transit reduces vehicle emissions and long-term pollution, yet building it can mean short-term loss of greenery. The honest answer is that both matter — and how carefully BMRCL executes afforestation will decide whether Phase 3 is a net positive for Bengaluru’s environment.

For residents, it’s a reminder that infrastructure choices are also ecological ones, and that accountability on replanting is worth watching closely.