JAKARTA/BINTAN, Indonesia -- Just a stone's throw from a seaside resort popular with tourists, a new industrial complex is expanding on Indonesia's Bintan island, which lies across a narrow strait from Singapore.

A Chinese-backed alumina refinery complex on Indonesia's Bintan Island is fouling the surrounding waters. It is just one of a growing number of "green tech" investments by China in the region. (Photo by Dimas Ardian)
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