Watch LiveBritish Broadcasting CorporationHomeNewsUS & CanadaUKUK PoliticsEnglandN. IrelandN. Ireland PoliticsScotlandScotland PoliticsWalesWales PoliticsAfricaAsiaChinaIndiaAustraliaEuropeLatin AmericaMiddle EastIn PicturesBBC InDepthBBC VerifyFootball 2026SportBusinessWorld of BusinessTechnology of BusinessNYSE Opening BellTechnologyWatch DocumentariesArtificial IntelligenceIntelligence RevolutionAI v the MindTech NowHealthWatch DocumentariesCultureWatch DocumentariesFilm & TVMusicArt & DesignStyleBooksEntertainment NewsArtsWatch DocumentariesArts in MotionTravelWatch DocumentariesDestinationsAfricaAntarcticaAsiaAustralia and PacificCaribbean & BermudaCentral AmericaEuropeMiddle EastNorth AmericaSouth AmericaWorld’s TableCulture & ExperiencesAdventuresThe SpeciaListEarthWatch DocumentariesScienceNatural WondersClimate SolutionsSustainable BusinessGreen LivingAudioPodcast CategoriesRadioAudio FAQsVideoWatch DocumentariesBBC MaestroDiscover the WorldLiveLive NewsLive SportDocumentariesSite searchHomeNewsSportFootball 2026BusinessTechnologyHealthCultureArtsTravelEarthAudioVideoLiveDocumentariesWeatherNewslettersWatch LiveWhy is newly renovated Reflecting Pool in Washington DC full of algae?The Lincoln Memorial Reflecting Pool in the US capital has turned green with algae days after it was refilled with water following renovations.
President Donald Trump ordered the revamp last year, claiming the pool had been left in a poor condition by President Joe Biden.
It's had issues with algae for decades. BBC Verify's Jake Horton has looked into what's behind the latest problem.
Produced by Ian Aikman, graphics by Leo Scutt-Richter
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