What happens if you dig a hole in a hill, and next, you give it slowly back to nature? This is the experiment that is going on on (or better in) Mount Saint Peter; mining the marl, creating a giant hole, and afterwards give it back to the hill, which is partly gone then, of course. It is a perfect example of how we destroy our planet… For YouTube result: ENCI groeve en hoeve Lichtenberg fotoboek
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