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Underground food farms could provide a revolutionary solution to the issue of a growing population and it's effect on crop production.
Abandoned coal mines - of which there are 150,000 in the UK - could be turned into underground greenhouses, which would mean crops would be unaffected by climate change and extreme weather, the greenhouses would require less energy for heating, and they would also reduce the burning of fossil fuels from farming machinery.
Professor Siffa Riffat from the Faculty of Engineering has been promoting the project.
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