Cornwall's last tin mine closed 20 years ago. Now growing demand for metals from ethical sources could spark a revival in one of Britain's most deprived regions.
원문출처 : https://www.cnn.com/2019/09/13/business/cornwall-tin-revival-tech/index.html
원문출처 : https://www.cnn.com/2019/09/13/business/cornwall-tin-revival-tech/index.html