"They are sensitive and they are completely covered in prehistoric markings which remain to be fully studied and any surface damage to the stones is hugely concerning.

Bullshit. There is next to no other historic site that has been studied in greater detail. If no scientist up until now has created a detailed map of what is to find on those stones, then frankly, it’s their own fault.

If anything, they should be concerned about acidic rain caused by air pollution. But you don’t hear much about that, now do you?