The effect of ocean acidification on marine life is significant, as increased CO2 levels lead to a decrease in seawater pH. This alteration negatively impacts calcifying organisms like coral reefs, mollusks, and some plankton species, which rely on calcium carbonate for their shells and structures. Acidification can impair their growth, reproduction, and survival, ultimately disrupting marine ecosystems and food webs. Additionally, it poses risks to the fishing industry and overall marine biodiversity, highlighting the urgent need for strategies to mitigate climate change impacts.