@GustavinoBevilacqua Thank you for that very good link!And these are the most obvious pollutions/dangers.I live near to the Maginot Line and in some forests, older trees are not allowed to be cut.The trees embedded the shrapnels. In the sawmill, this can cause the blades to crack, resulting in serious injuries.One day I have to translate my #essay about the impact of a WWI #oil field until now (belonging to the National #Petroleum Museum of France): https://www.cronenburg.net/carreauclemenceau/#fossilFuels