No evidence to prove odd-even improved Delhi's air quality

As curtains came down on the odd-even pilot scheme, an independent think tank on Friday said there is no "conclusive" evidence to prove that the policy improved Delhi's air quality or reduced traffic congestion.

Council on Energy, Environment and Water measured air quality and traffic volumes at five important locations in the city. It said, while air pollution levels "increased" in the first week of January, and in the second week despite being marginally better air quality, it still remained poor.