Washington, March 9: A new study has shown that the shells of microscopic animals in the ocean are becoming thinner thanks to the ocean's increasing absorption of carbon dioxide.
As carbon dioxide from the burning of fossil fuels has accumulated in the atmosphere, some of it has been absorbed by the ocean.
As the gas dissolves in the water, it forms a weak acid, causing the ocean itself to become gradually more acidic.
With the ocean water becoming more acidic, it also lowers the amount of calcium carbonate available to aquatic animals that use the mineral to build shells or skeletons, such as corals.
These organisms can be important links in the marine food chain.