In 2023, Canadian firm Planetary released 280 tonnes of an antacid-like mineral into Halifax Harbour over two months to test whether more alkaline seawater can absorb extra CO₂

In August 2023, Planetary Technologies conducted an ocean alkalinity enhancement experiment in Halifax Harbour, Nova Scotia, Canada. Researchers introduced minerals commonly found in antacid medication into the waters near a coastal power plant, turning the water milky pink.

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