Mumbai Metro’s real green moment is yet to arrive

A study by the Indian Institute of Technology-Bombay (IIT-B) on greenhouse gas (GHG) emissions from the Versova-Andheri-Ghatkopar metro railway, the first of the many that will crisscross Mumbai, said the service prevents daily emissions of 22.7 tonnes of carbon dioxide (CO2) because its commuters have shifted away from more-polluting buses and other road vehicles.

But the operation releases 75.6 tonnes of CO2 every day because the service consumes electricity for traction, lighting, air-conditioning, escalators and other facilities.