Tree loss in Bengaluru rail project raises questions over environmental safeguards

Concerns over ecological impact have resurfaced in Bengaluru, after a recent assessment found that a majority of transplanted trees along a key suburban rail corridor have not survived, highlighting gaps in environmental mitigation within large infrastructure projects.

A report by Rail Infrastructure Development Company (Karnataka) Limited noted that only about 45 per cent of trees relocated for Corridor 2 of the suburban rail project remain viable. The findings have prompted renewed scrutiny of tree transplantation practices, often used as a compensatory measure during project execution.

Tree relocation is typically presented as a means to balance development with conservation. However, experts have long argued that survival rates are uneven and dependent on factors such as species type, soil conditions, and post-transplant care. In dense urban environments, these variables are harder to control, reducing the effectiveness of such interventions.

The suburban rail project itself is a critical component of Bengaluru’s long-term mobility plan, intended to ease congestion and provide an alternative to road-based transport. Yet, the environmental cost of such expansion is becoming increasingly visible, particularly in cities already facing shrinking green cover.

Officials associated with the project maintain that mitigation efforts are ongoing, including compensatory plantation drives. Environmental groups, however, argue that replacement planting does not fully offset the loss of mature trees, which play a significant role in regulating urban microclimates.

The episode underscores a broader tension in infrastructure development. As cities expand and invest in large transport systems, balancing ecological considerations with economic and mobility needs remains a complex challenge. The Bengaluru case serves as a reminder that environmental safeguards, often treated as procedural requirements, need closer monitoring and more rigorous implementation.