Really interesting paper. I am a Cornishman born & bred... In the day, when I was a youngster St Austell and area was awful. The Mining methods for china clay were extraordinarily invasive and the area was covered in white spoil heaps and huge pits. The amazing thing is that the development of the process is now such that more clay than ever is being produced, albeit with a vastly reduced workforce (I have seen figures but can't now find them).
Let's hope that modern mining techniques would enable the same vastly reduced impact should lithium start to be mined downalong. At least it would provide some industry that would give employment other than tourism.