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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?
An abolitionist lithograph of the slave trade in Washington, D.C., with the U.S. Capitol in the background. Library of Congress

White mobs rioted in Washington in 1848 to defend slaveholders’ rights after 76 Black enslaved people staged an unsuccessful mass escape on a boat

Michael David Cohen, American University

Riots by proslavery forces raged for three days in the nation’s capital after the capture of a ship bearing fugitive enslaved people. The president, a slaveowner himself, tried to calm the city.

Related Topics

  1. Daniel Bell
  2. National Mall
  3. raw sewage
  4. Sewage
  5. Sewage testing
  6. Washington DC

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