The Trump administration spent more than $14 million (£10.5 million) trying to turn the reflecting pool in front of Washington’s Lincoln Memorial “American flag blue” for the 250th anniversary of US independence, said The Guardian. But residual algae has “proliferated” in warm weather, instead turning the pool “Wicked” green.
The internet is awash with jokes at the administration’s expense, but toxic algae blooms are a worldwide phenomenon that can harm humans and devastate marine life. And as the climate crisis warms the water, the problem is growing.
‘Underwater bushfire’ “Algal blooms are a rapid, explosive growth of algae,” said pharmacology researcher Ian Musgrave on The Conversation. Blue-green algae, known as cyanobacteria, naturally occur in inland waters, estuaries and the sea. They can “suffocate fish” and produce toxins that cause nausea, skin irritation, and even liver failure in humans.
Algae have “flared at hotspots” along the South Australian coastline, causing “stinging eyes, coughing, rashes, headaches and breathing difficulties” among surfers, said ABC. Beachgoers are “horrified by the dead animals washing ashore”, said The New York Times. A crowdsourced platform has recorded more than 100,000 instances of dead sea life in the region since February last year. “It was literally just like an underwater bushfire,” said a recreational fisherman.
‘Visible from space’ Harmful algal blooms stalk shores far beyond Australia. In Southern California, an “unprecedented, multi-toxin event” last year killed hundreds of seabirds, sea lions and dolphins, said the Public Policy Institute of California.
The UK’s largest freshwater lake, Lough Neagh (pictured above) in Northern Ireland, has also been “choking on recurring toxic algal blooms” for years, said The Guardian. The algae feed on high levels of nutrients in the water, mainly from agricultural run-off, fertiliser and livestock waste, as well as “inadequate wastewater treatment”. Global warming has also increased the temperature of the lough, encouraging the abundant blooms.
In some places, the green sludge is “so widespread it is visible from space”, said The Guardian. The blooms “coat the surface, kill wildlife, unleash stenches and make the lake all but unusable”, and the impact on wildlife and tourism is “incalculable”.
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