On Monday Dr. Harsh Vardhan has inaugurated the air purifiers ‘WAYU’ at ITO intersection and Mukarba Chowk. The installed devices will keep the air clean within the area of 500 sqm. Delhi is the first state to experience the clean air. The devices will be installed in the areas badly affected by pollution. Rs 1,500 will be spent on its maintenance monthly. By Oct 15, 54 more WAYU are planned to be installed in Delhi.