The Reflecting Pool in Washington, DC, has turned an unexpected shade of green. According to NPR, algae has clouded the famous landmark's waters, obscuring what was envisioned as an American flag blue expanse. The explanation is straightforward: shallow, sunny conditions create ideal breeding ground for algae in the summertime. Experts say a recent renovation of the pool may have actually accelerated the problem, leaving one of the nation's most iconic monuments temporarily transformed by an algae bloom.

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