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A 120 metre-long art installation made of disposed plastic bottles marks the World Environment Day in Singapore's Marina Barrage rooftop park on June 5, 2018. (Xinhua/Then Chih Wey)
 
 
A 120 metre-long art installation made of disposed plastic bottles marks the World Environment Day in Singapore's Marina Barrage rooftop park on June 5, 2018. (Xinhua/Then Chih Wey)