Straty i zagrożenia od szczelinowania łupków w Polin

[youtube https://www.youtube.com/watch?v=cpRCwc1xXg0?feature=player_detailpage&w=640&h=360]

[youtube https://www.youtube.com/watch?v=qbH6O5bbUjo?feature=player_detailpage&w=640&h=360]

[youtube https://www.youtube.com/watch?v=NM5lay45o6s?feature=player_detailpage&w=640&h=360]

By piotrbein

https://piotrbein.net/about-me-o-mnie/