▁methods ▁by ▁which ▁abandoned ▁mine ▁d rain age ▁can ▁be ▁rem ed ied : ▁pass ive ▁treatment , ▁active ▁treatment , ▁and ▁land ▁re clam ation . ▁T rom pes ▁may ▁also ▁be ▁useful ▁in ▁tre ating ▁abandoned ▁mine ▁d rain age . ▁ ▁The ▁natural ▁gas ▁industry ▁has ▁suggested ▁using ▁abandoned ▁mine ▁d rain age ▁water ▁in ▁hyd ra ul ic ▁f ract uring . ▁Pro ponents ▁of ▁this ▁idea ▁say ▁that ▁it ▁would ▁remove ▁to xic ▁water ▁from ▁the ▁environment ▁while ▁reducing ▁the ▁natural ▁gas ▁industry ' s ▁need ▁to ▁use ▁water ▁from ▁streams ▁and ▁rivers . ▁However , ▁oppon ents ▁have ▁said ▁that ▁it ▁would ▁" make ▁a ▁dirty ▁process ▁even ▁d irt ier ". ▁This ▁has ▁already ▁been ▁done ▁with ▁streams ▁such ▁as ▁an ▁un named ▁trib ut ary ▁to ▁Johnson ▁Creek . ▁Ab andon ed ▁mine ▁d rain age ▁sol ids ▁have ▁shown ▁potential ▁in ▁capt uring ▁mer cur y ▁em issions ▁from ▁coal - f ired ▁power ▁plants . ▁ ▁The ▁iron ▁ox ide ▁generated ▁by ▁tre ating ▁abandoned ▁mine ▁d rain age ▁can ▁be ▁used ▁as ▁a ▁gla ze ▁for ▁pot tery . ▁ ▁References ▁ ▁External ▁links ▁Ab andon ed ▁mine ▁d rain age ▁on ▁Pub Med ▁ ▁Category : W ater ▁poll ution ▁Category : M ining ▁and ▁the ▁environment <0x0A> </s> ▁And or ra ▁is ▁a ▁so ver eign ▁land locked ▁micro state ▁in ▁South western ▁Europe , ▁located ▁in ▁the ▁eastern ▁Py ren ees ▁mountains ▁and ▁border ed ▁by ▁Spain ▁and ▁France