Researchers have discovered an innovative method to significantly reduce harmful emissions from the global shipping industry. A study published in Science Advances explores a shipboard system known as accelerated weathering of limestone (AWL), which mimics the ocean’s natural carbon sequestration process. If implemented on a large scale, this system could potentially halve carbon pollution from shipping.
The AWL process is straightforward: carbon dioxide from a ship’s exhaust is absorbed by seawater, increasing its acidity. This acidic water then passes through limestone, resulting in a reaction that forms bicarbonate, a compound found in seawater. The treated water is subsequently released back into the ocean with minimal impact on its pH balance.
William Berelson, one of the study’s authors, noted that the research originated from a simple inquiry into how oceans buffer carbon dioxide. He emphasized that AWL could provide a practical solution to combat climate change. Given that maritime shipping accounts for about 3% of global pollution, finding effective solutions is crucial.
While promising, the research is still in its early stages. In the meantime, protecting ocean health through actions like reducing plastic use and supporting eco-friendly brands remains essential.
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