'Sensing system' spots struggling ecosystems

A new "resilience sensing system" can identify ecosystems that are in danger of collapse, research shows. The system uses satellites to spot areas of concern—including those at risk of "tipping points"—and can also measure ...

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.

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