by David Ross, Highland Correspondent, The Herald.
It's widespread use in buildings gave Aberdeen its internationally recognised title of the Granite City, but now the grey rock could herald a second energy-led boom in the north-east.
A demonstration geothermal energy plant could be built between Aberdeen and Peterhead, attracting £750 million of investment in its first 10 years, if forthcoming research finds that the heat of subterranean granite could feed it.
Four miles down into the earth, the temperature normally rises by 150°C. However, where there is granite rock, it can rise by 210°C. That creates hot springs, which for centuries have been used for bathing, but now such “hot rocks” are becoming better known for electricity generation. Crucially, it is also classed as a renewable energy source.
To read the full article, please visit: www.heraldscotland.com.