Mining companies are calling for a surge in production, ignoring an environmental disaster in 1998, when mine tailings containing toxic levels of heavy metals contaminated a whole river valley. Many worry it could happen again. For more news go to: http://www.dw.com/en/ Follow DW on social media: ►Facebook: https://www.facebook.com/deutschewellenews/ ►Twitter: https://twitter.com/dwnews ►Instagram: https://www.instagram.com/dw_stories/ Für Videos in deutscher Sprache besuchen Sie: https://www.youtube.com/channel/UCMIgOXM2JEQ2Pv2d0_PVfcg DW Deutsch Abonnieren: http://www.youtube.com/user/deutschewelle?sub_confirmation=1 Mehr Nachrichten unter: https://www.dw.com/de/ DW in den Sozialen Medien: ►Facebook: https://www.facebook.com/deutschewellenews/ ►Twitter: https://twitter.com/dwnews ►Instagram: https://www.instagram.com/dw_stories/