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A close-up of rare earth metal produced at a facility in Fort Worth, Texas. Critiical minerals are seen as essential for a 21st century economy, and as the U.S. seeks more of them, research is showing there is more to be gained from materials that have already been mined.

Pursuit of critical minerals unearths new idea: Use what鈥檚 already dug up

How to reuse exhaust from jets and store energy in sand

Grafting for chocolate in Peru, and going after invasive species in New Zealand

The secret to sustainably farming the Amazon? The 鈥榤iracle鈥 Inga tree.

What USAID cuts mean for Peru as it battles cartels on coca, gold trade

In Syria, what remains of Iran鈥檚 regional 鈥楢xis鈥 is rubble and resentment

In the Philippines, jeepneys rule the road. But for how much longer?

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A student鈥檚 鈥榓ha鈥 moment becomes a nation鈥檚 alternative fuel

Earth Day and the ingredients for progress

There鈥檚 one rare earths mine in the US. How that might change soon.