Investment is pouring into companies promising to geoengineer a rapid change in the pH of our waters – but critics are concerned at the speed at which unproven methods are being adopted
In October 2024, a US company called Ebb Carbon announced the world’s largest marine carbon removal deal to date, signing a multimillion-dollar agreement with Microsoft to try to help fix a very real problem in the world’s seas: ocean acidification.
Ebb plans to use a method called electrochemical ocean alkalinity enhancement (OAE) to mimic the natural process of ocean alkalisation – in other words, it wants to add huge amounts of alkaline materials to ocean waters that scientists now know are acidifying at an alarming rate.
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