Arunachal rivers free from pollution: CGWB
As per CPCB report, only about 40-50 per cent of the population of the major cities like Delhi, Mumbai, Kolkata, Chennai and Bangalore were served by sewer systems.
Jan 31, 2016, 19:28 PM IST
As per CPCB report, only about 40-50 per cent of the population of the major cities like Delhi, Mumbai, Kolkata, Chennai and Bangalore were served by sewer systems.
Jan 31, 2016, 19:28 PM IST