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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.
A better understanding of the interactions between snow cover and forest will help improve hydrological models and thus ensure public protection against flooding. (Benjamin Bouchard)

Understanding the dynamics of snow cover in forests can help us predict flood risks

A better understanding of the interactions between the boreal forest and snow will make it possible to improve hydrological models and ensure optimal management of the resource.
Fly-fishing in Alaska’s Tongass National Forest. Joseph/Flickr

What social change movements can learn from fly fishing: The value of a care-focused message

Founded in 1959, the membership group Trout Unlimited has changed the culture of fly-fishing and mobilized members to support conservation. Could its approach work for other social problems?

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