Waterways in Brazil's Manaus choked by tons of trash

In Manaus, the largest city in Brazil's Amazon rainforest, tons of stinking trash fill the canals and streams, giving one the feeling that they're visiting a post-apocalyptic wasteland.

Who's responsible for roadside rubbish?

New research reveals that items in litter typically originate less than two miles from where they're found—and unless humans remove them, most of these items will never leave the environment.

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