GHG goods History services concerns Definition early 2000s communities restoration individuals implementing technologies Organizations other domains water quality Virtual Water water footprint positive impact water resources allegianceindia aquifer recharge greenhouse gases water ecosystems water purification Æ Water Management hidden water value water availability efficiency measures environmental impact construction industry Allegiance Enterprise ecosystem conservation sustainable management construction practices mere water conservation Water Impact Assessment Prof. John Anthony Allan various industrial domains global freshwater scarcity indirect water consumption The Water Positive concept The Water Positive Initiative tangible water exchange value other water compensation projects trade Allegiance Water Management