Eric Palkovacs

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A National Park Service employee uses a vacuum to clean the Lincoln Memorial Reflecting Pool on June 20, 2026. AP Photo/Mark Schiefelbein

When your local reflecting pool or pond turns green with algae, don’t reach for chemicals – nature has better solutions

Eric Palkovacs, University of California, Santa Cruz

As the national conversation shifts to political finger-pointing, an important environmental question deserves careful scrutiny: What is the best approach to maintain urban water quality?
Chinook salmon try to jump a closed gate at a fish hatchery. Supercaliphotolistic/iStock Images Plus via Getty Images

California’s salmon fishery is reopening after a population crash led to a 3‑year closure, but that doesn’t mean all is well

Eric Palkovacs, University of California, Santa Cruz and Steven T. Lindley, University of California, Santa Cruz

Salmon have faced a boom-bust cycle for years. Making their recovery last longer will require some big changes, including how hatcheries produce fish.

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