Diesel generator pollution study reveals higher health risks from ultrafine particles in Mumbai and Indian cities

A new study from Shiv Nadar University published in Emission Control Science and Technology finds that diesel generators emit large amounts of ultrafine and submicron particles loaded with toxic carbon compounds. These particles can penetrate deep into the lungs, raising risks for respiratory illness, cardiovascular disease, and cancer. The research highlights that stationary diesel generators, widely used in Mumbai and other Indian cities as backup power, are a hidden source of pollution that has received less attention than vehicle or industrial emissions. The study calls for better regulation and awareness of diesel generator emissions, especially in urban areas where they are common in housing societies, hospitals, and commercial buildings. For carbon markets and climate policy, this underscores the need to account for backup power sources in emissions inventories and to push for cleaner alternatives like battery storage or grid reliability improvements. The health costs of diesel generators add urgency to grid decarbonization efforts in India.