The world population is growing steadily and with it, the food it requires. At the same time, traditional ways of growing food are becoming increasingly uncertain because of drought and other extreme weather events. More people are moving to urban areas where there is no room for large fields and so regional cultivation is not an option. These are a fair bit of problems.
Scientists at the University of Nottingham have now presented a possible solution: Vertical Farming underground. In the UK there are 150,000 abandoned coal shafts. As professor Saffa Riffat told the BBC, these could be used for so-called 'underground farming'. This means that vegetables can be grown on shelves, in these shafts.
25,000 square kilometers of emptiness
The advantage of this would be that in addition to using the empty spaces, vegetable cultivation underground would not be dependent on the weather. Through artificial lighting and irrigation, the seasons would become completely irrelevant. This year's summer has shown how much agriculture still depends on the weather and due to climate change, more and more of such events are expected in the future.
According to Riffat, a 7 m2 shaft could produce 80 tons of food per year. That's eight to ten times as much as on the same area of land above ground. All vacant shafts in the UK combined cover some 25,000 square kilometers. So there is a huge potential. The scientist estimates the costs per shaft to be at around 33,000 euros.