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CNG (compressed natural gas) was fully implemented in public transport system in Delhi in December 2002. The study assesses the benzene concentration trends at two busy traffic intersections and a background site in Delhi, India. Monitoring was done for two different time periods viz; in the year 2001–2002 (pre-CNG) and two winter months (January and February) of the year 2007 (post-CNG) to assess...
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