Ler Ex company has polluted Geghi River in Syunik region, says Pan-Armenian Environmental Front.
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"Such things have happened on a regular basis over the last three years, with the authorities doing nothing but fixing some symbolic fines. This is a criminal case and it must be invested by the police," the Greens say.
In Feb 2014 Armenia's Environment Protection Ministry estimated the damage caused by Ler Ex to nature at 178,500 AMD.