HEI study finds London Congestion Charging Scheme shows little evidence of improving air quality
Green Car Congress
APRIL 27, 2011
ppb on average; the investigators attributed this increase to higher NO 2 emissions associated with the introduction of particle traps on diesel buses as part of Transport for London’s improvements in the public transport system. NO 2 was projected to increase slightly, by 0.3 —Kelly et al. Resources.
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