http://www.bbc.co.uk/news/uk-scotland-g ... t-21431763
Researchers are launching a project which aims to use water from abandoned coal mines to provide up to 40% of Glasgow's heat.
It is hoped reservoirs in the city's old tunnels can be used to create geothermal energy.
The process uses pumps to extract heat from the stored water, which can provide a cheap way to heat homes.
A Glasgow Caledonian University team will identify underground reservoirs with the potential to heat homes.