KOH CHANG, Thailand: As a long-tail boat arrives at a fishing village on the southern Thai island of Koh Chang, residents gather to sell their wares – not seafood, but plastic. The villagers, members of the semi-nomadic Moken people, are selling to Tide, a start-up attempting to create new value fro

As a long-tail boat arrives at a fishing village on the southern Thai island of Koh Chang, residents gather to sell their wares -- not seafood, but plastic. On Koh Chang, a 30-minute speedboat ride from the sleepy southern town of Ranong, the Tide boat's arrival prompts a flurry of activity.

As a long-tail boat arrives at a fishing village on the southern Thai island of Koh Chang, residents gather to sell their wares -- not seafood, but plastic. On Koh Chang, a 30-minute speedboat ride from the sleepy southern town of Ranong, the Tide boat's arrival prompts a flurry of activity.

As a long-tail boat arrives at a fishing village on the southern Thai island of Koh Chang, residents gather to sell their wares—not seafood, but plastic.