Oceans’ Acidic Shift May Be Fastest in 300 Million Years

By Deborah Zabarenko WASHINGTON (Reuters) – The world’s oceans are turning acidic at what could be the fastest pace of any time in the past 300 million years, even more rapidly than during a monster emission of planet-warming carbon 56 million years ago, scientists said on Thursday. Looking back at that bygone warm period in Earth’s history could offer help in forecasting the impact of human-spurred climate change, researchers said of a review of hundreds of studies of ancient climate records published in the journal Science. Quickly acidifying seawater eats away at coral reefs, which provide habitat for other animals and plants, and makes it harder for mussels and oysters to form protective shells.

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Oceans’ Acidic Shift May Be Fastest in 300 Million Years