Here's why:
* CO2 is a greenhouse gas: Human activities like burning fossil fuels release vast amounts of CO2 into the atmosphere.
* CO2 dissolves in water: The ocean acts as a massive carbon sink, absorbing a significant portion of this atmospheric CO2.
* Chemical reaction creates carbonic acid: When CO2 dissolves in water, it reacts with water molecules to form carbonic acid (H2CO3).
* Increased acidity: This carbonic acid increases the acidity of the ocean, lowering its pH.
This process is known as ocean acidification.
The consequences of ocean acidification are severe:
* Impacts on marine life: Many marine organisms, particularly those with calcium carbonate shells or skeletons (like corals, shellfish, and plankton), struggle to build and maintain their structures in more acidic waters.
* Disruption of marine ecosystems: The decline of these organisms can ripple through entire ecosystems, affecting food webs and biodiversity.
* Potential economic impacts: Ocean acidification threatens fisheries, aquaculture, and coastal tourism.
It's crucial to understand that ocean acidification is a direct result of human-induced climate change and is a major concern for the health of our oceans and planet.
