" 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...
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