An Environment Department official today said traffic authorities who were "unsure" whether they had the requisite powers to impose the fine in this regard have been told by the city government that they could do so under an NGT order.
"Until now traffic authorities could penalise errant vehicles up to Rs 2,000 under the Motor Vehicles Act. Now the fine will go up to Rs 5,000 and they can very well do acting on relevant orders of the National Green Tribunal," a senior government official said.
In another letter, the city's Environment Secretary has told traffic authorities that they can deposit the collected fine with the DPCC till they have their own arrangements.
"The money has to be spent for improving the environment in any case. It cannot be spent under any other head. For example the MCDs keep the money they collect from fining those who burn waste in the open. They have their own mechanism," the official said.
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An IIT-Kanpur study has identified trucks and road dust as the major polluters behind Delhi's hazardous air quality with the former contributing up to 38 per cent of PM 2.5 (particulate matter less than 2.5 microns).
During winters, vehicles contribute up to 25 per cent of PM 2.5 emissions, while 26 per cent comes from biomass burning.
During summers, coal and flyash contribute to 26 per cent of PM 2.5, soil and road dust 27 per cent, biomass burning 12 per cent, while vehicles contribute 9 per cent as per the report.