A community member protects the forest from illegal loggers in the town of Cherán.

A boom in avocado production in Mexico has led to illegal deforestation and an influx of drug cartels dominating the lucrative trade. But Indigenous communities have fought back against the gangs and turned to traditional practices to grow avocados and save their forests. 

By Agustín del Castillo and Fred Pearce

Solutions

A.I. Is Quietly Powering a Revolution in Weather Prediction

Weather forecasts powered by artificial intelligence are usually more accurate — and require less computational energy and fewer human hours — than conventional predictions. But questions remain about A.I. systems’ reliability and their ability to forecast extreme weather events.

By Nicola Jones

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Dead freshwater mussels gathered from the Clinch River in Virginia.

Biodiversity

With the Great Mussel Die-Off, Scientists Scramble for Answers

One of the most endangered animals in the world, freshwater mussels are threatened by pollution, climate change, habitat loss, and invasive species. But in the epicenter of their diversity — the Southeastern U.S. — the root cause of a catastrophic die-off remains a mystery. 

By Jim Robbins

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