Gurugram, Oct. 5 -- The Haryana State Pollution Control Board's air quality action plan for the city, which aims for a 35% reduction in PM2.5 and PM10 concentrations by 2022, received in-principle approval from the state government on Friday. The plan will now be sent for approval to the Central Pollution Control Board (CPCB) and Environment Pollution (Prevention and Control) Authority (EPCA), and is expected to be implemented before the end of this year....