"Rat-Hole mining is 'Boon' sometimes, but 'Curse' most of the times!" National Green Tribunal (NGT) has banned the practice in 2014! But, Why? I

"Rat-Hole mining is 'Boon' sometimes, but 'Curse' most of the times!" National Green Tribunal (NGT) has banned the practice in 2014! But, Why? I