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In urban areas, one of the major sources of air pollution is emissions from transport vehicles.
Steps taken to reduce such pollution include
(i) introduction of compressed natural gas (CNG) in Delhi and other cities;
(ii) Retiring old, polluting vehicles; and
(iii) Strengthening of mass transportation.
Some state governments provide subsidies for purchase and use of electric vehicles. For thermal power plants, the installation of electrostatic precipitators is mandatory. In many cities, polluting industrial units have either been closed or shifted from residential areas.