Demonstrators, holding signs to protest against Taiwanese enterprise Formosa Plastic and environmental-friendly messages, say they are demanding cleaner waters in the central regions after mass fish deaths in recent weeks, in Hanoi, Vietnam May 1, 2016. REUTERS/Kham

Demonstrators, holding signs to protest against Taiwanese enterprise Formosa Plastic and environmental-friendly messages, say they are demanding cleaner waters in the central regions after mass fish deaths in recent weeks, in Hanoi, Vietnam May 1, 2016. REUTERS/Kham

Demonstrators, holding signs to protest against Taiwanese enterprise Formosa Plastic and environmental-friendly messages, say they are demanding cleaner waters in the central regions after mass fish deaths in recent weeks, in Hanoi, Vietnam May 1, 2016. REUTERS/Kham

May 1, 2016 4:05 AM (UTC+8)