In a radical step aimed at curbing air pollution in the India’s Delhi that has assumed "critical" level, the Arvind Kejriwal government yesterday announced that private vehicles bearing odd and even registration numbers will be allowed to ply only on alternate days starting January 1, reports Times of India.  In a meeting chaired by Kerjriwal, a day after the high court compared Delhi to a "gas chamber", the government decided steps to check pollution, which included shutting down of a thermal power plant and making it mandatory for vehicles to have Euro VI emission norms from 2017. The odd/even number scheme, similar to the one in place in Beijing and Singapore, allows vehicles with number plates ending with an odd number to be driven one day while those ending with an even number can be plied the next day, meaning that a motorist will be able ply his vehicle for 15 days in a month.