Initiatives have been taken to develop an extensive inventory of greenhouse gases (GHG) emission sources in Delhi. However, there is a need to integrate the emission of air pollutants and GHG, which may have significant overlap and may require a common strategy to mitigate these emissions.

The IIT Kanpur study makes it clear the entire NCR contributes to Delhi's alarming air pollution levels and even with all control measures implemented this year on, Delhi will not achieve the desired PM levels by 2023 but can halve the hazardous PM levels.

Pollution control strategies for attainment of particulate standards must be able to provide convincing evidence that the relative importance of emission sources is understood and that the control programmes proposed are cost-effective and can be adopted by the community with confidence.

Vehicle fuel economy (FE) norms are being implemented world over to conserve energy and for reduction in carbon dioxide emissions. In the USA, fleet average FE standards were set beginning from the year 1978, but these remained stagnant after the year 1992 until the year 2005 when the standards for light trucks were upgraded.

Vehicle fuel economy (FE) norms are being implemented world over to conserve energy and for reduction in carbon dioxide emissions. In the USA, fleet average FE standards were set beginning from the year 1978, but these remained stagnant after the year 1992 until the year 2005 when the standards for light trucks were upgraded.