Mumbai tops Indian cities for road traffic CO₂ emissions per km: Study

• Mumbai leads Indian cities in road traffic CO₂ emissions per kilometre, primarily due to its dense vehicle population, according to a new study.
• The research, part of the CHETNA project, analyzed daily emissions across 15 major Indian cities for 2021 using high-resolution mapping.
• Mumbai recorded both the highest vehicle density and per-kilometre CO₂ emissions among the cities studied.
• Delhi and Bengaluru, along with Mumbai, were the largest contributors to total road traffic CO₂ emissions nationwide.
• The study also identified nitrogen oxides (NOx) and carbon monoxide (CO) as dominant pollutants, with higher levels in larger metropolitan areas.

Why It Matters: Mumbai's high traffic CO2 emissions highlight urgent urban health and planning challenges.