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Good evening. This snapshot of stories and roundup is recommended just for you, based on your interests and reading history. | | | | (The Washington Post/Emma Kumer/The Washington Post; iStock) | | | | | | |  What to know The Lincoln Memorial Reflecting Pool's persistent algae problem stems from its construction on former marshland. A natural ecosystem approach, using biofilters and bioreactors, could clear the water without chemicals. Summary is AI-generated, newsroom-reviewed. | | | | | How was today's newsletter? | | | | | | | | |
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