Delhi recorded its highest average carbon monoxide levels for the January to May period since 2022, according to a new report. The data shows a clear rise in this pollutant, which comes mainly from vehicle exhaust and incomplete combustion of fossil fuels. The trend raises concerns about air quality management and the effectiveness of current emission control measures in the capital region. Carbon monoxide is a direct product of burning gasoline, diesel, coal, and biomass. Higher levels suggest that either vehicle numbers are increasing faster than expected, or that industrial and residential combustion sources are not being curbed. This matters for climate and health policy because CO is both a local health hazard and a marker for inefficient combustion that also releases CO2 and black carbon. The report does not break down the sources by sector, which would help target interventions. Without that detail, it is hard to tell whether better public transit, stricter industrial rules, or cleaner cooking fuel programs are the priority. Policymakers in Delhi will need that data to decide where to act first.
