" HEEALS ": HUMAN WASTE TO LIGHT UP BIO-TOILETS DEVELOPED BY D...

" HEEALS ": HUMAN WASTE TO LIGHT UP BIO-TOILETS DEVELOPED BY D...: HUMAN WASTE TO LIGHT UP BIO-TOILETS DEVELOPED BY DRDO Picture:  Kolkata, July 4, 2012:  Methane gas generated from human waste could be us...