Articles on Significant Terms

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Haitian students use mobile phones to record an exercise during an English class in Springfield, Ohio, on Sept. 13, 2024. Roberto Schmidt/AFP via Getty Images

What is Temporary Protected Status? A global migration expert explains why the US offers some foreign nationals temporary protection

TPS allows migrants whose home countries are considered unsafe the right to live and work in the US for a temporary period. They are not considered lawful permanent residents or US citizens.
A large-scale battery storage system in Long Beach, Calif., provides renewable electricity during peak demand periods. Patrick T. Fallon/AFP via Getty Images

What is a virtual power plant? An energy expert explains

Some power plants don’t have massive smokestacks or cooling towers – or even a central site.
In 2022, California built an emergency drought barrier across the West False River near Oakley to protect against saltwater intrusion. AP Photo/Terry Chea

What is seawater intrusion? A hydrogeologist explains the shifting balance between fresh and salt water at the coast

Saltwater intrusion is bad for human health, ecosystems, crops and infrastructure. Here’s how seawater can move inland, and why climate change is making this phenomenon more frequent and severe.

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