India, Nov. 15 -- With winter approaching, the Brihanmumbai Municipal Corporation (BMC) has ramped up action against construction sites that violate air pollution norms. On Wednesday, the civic body issued a show-cause notice to the under-construction Metro line 7A-an extension of line 7, connecting Andheri East to the Chhatrapati Shivaji Maharaj International Airport-for failing to follow its air pollution mitigation guidelines.

The notice flagged violations such as the absence of a 25-foot tin sheet around the site, the lack of a tyre-washing facility for trucks, a dusty and debris-laden access road, and the lack of air quality monitoring sensors and display boards. The notice was issued to the Mumbai Metropolitan Region Development Au...