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The Centre has asked all metro rail corporations to install retrofitted devices in diesel generators being used by them, a move aimed at reducing particulate matter emissions from DG sets. According to National Clean Air Programme (NCAP), DG sets contribute 7-18 per cent to the ambient air pollution in non-attainment cities, said the union housing and urban affairs (HUA) ministry, in a letter to the corporations.
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- Non-attainment cities are areas with air quality worse than the National Ambient Air Quality (NAAQ) Standards.
- There are several metro rail corporations, including Delhi Metro, Chennai Metro and Bengaluru Metro.
- DG sets are used in a large scale in metro line construction, emergency power supply in metro rail, places with tourist infrastructure, central command rooms, waste-water treatment plants, construction, and infrastructure works, the ministry said.
- It also asked metro rail corporations to use retro-fitted emission control equipment with diesel generators having a minimum specified particulate matter capturing efficiency of at least 70%.
- The Government has also asked metro rail corporations to shift to gas-based generators either by retrofitting existing generators for partial usage of gas (a mixture of diesel and gas) or buying new gas-based generators.
- In a recent communication to ministry, Centre of Excellence for Research on Clean Air, IIT Delhi also mentioned there is a huge scope to reduce the adverse impact of pollution through the installation of the retrofitted emission control system in DG sets.
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