Thousands of abandoned US coal mines could store clean energy as 'water batteries'. This matters for renewable energy solutions. What role can repurposed infrastructure play in sustainability? #EnergyStorage #SustainableTech #RenewableEnergy 🌎 https://timesofindia.indiatimes.com/world/us/thousands-of-abandoned-coal-mines-in-the-us-could-become-giant-water-batteries-storing-clean-energy-scientists-say/articleshow/129584544.cms