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.

Cities provide paths from poverty to sustainability

New international agreements commit all UN member nations to solving humanity's greatest challenges over the next few decades, from eliminating extreme poverty and unhealthy living conditions to addressing climate change ...

Mexico City trash-for-food market helps clean city

On a recent rainy Sunday morning in a Mexico City neighborhood, people lined up under their umbrellas with bags of empty milk cartons, plastic bottles and cardboard at their feet.

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