Acidification may refer to:
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Ocean acidification
Ocean acidification is the reduction in the pH value of the Earth’s ocean. Between 1751 and 2021, the average pH value of the ocean surface has decreased from approximately 8.25 to 8.14. The root cause of ocean acidification is carbon dioxid ...
, decrease in the pH of the Earth's oceans
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Freshwater acidification, atmospheric depositions and soil leaching of SOx and NOx
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Soil acidification, buildup of hydrogen cations, which reduces the soil pH
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Souring, a cooking technique
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