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مشاهدة النسخة كاملة : Study: Swiss sewage rich with gold and silver



BECKHAM
10-10-2017, 02:22 PM
Three million francs worth of gold and silver is lost from wastewater treatment plants in Switzerland every year, according to a new study.

for more... (https://www.thelocal.ch/20171010/millions-of-francs-worth-of-gold-and-silver-ends-up-in-swiss-sewage-each-year)