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How is one Hong Kong conservancy group fighting litterbugs?

Answer: with DNA profiling

In a campaign designed to publicly shame litterbugs, Hong Kong Cleanup is collecting litter and posting public images of the person who dumped the trash.

Using DNA collected from the litter, “The Face of Litter” showcases a cutting-edge technology while attempting to affect social change by reducing instances of littering. Discarded condoms, coffee cups and cigarette butts provide the genetic information organizers need to find the next face of their campaign.