​​What is Ocean acidification and why is it a problem?

Ocean acidification is the ongoing decrease in the pH of the Earth’s oceans, caused by the uptake of carbon dioxide from the atmosphere. Seawater is slightly basic, and ocean acidification involves a shift towards pH-neutral conditions rather than a transition to acidic conditions.
The Global Problem of Ocean Acidification. Carbon dioxide (CO2) from burning fossil fuels is changing the fundamental chemistry of our oceans. CO2 reacts with sea water to form carbonic acid. As atmospheric CO2 has risen, the oceans have become 30% more acidic over the last 150 years.Carbon dioxide (CO2) from burning fossil fuels is changing the fundamental chemistry of our oceans. CO2 reacts with sea water to form carbonic acid. As atmospheric CO2 has risen, the oceans have become 30% more acidic over the last 150 years.