Ocean acidification is a rising problem on Earth. It is a term used to decribe the rising acidity in the oceans. 1/3 of the carbon dioxide we edmit from burning ficil fuels is absorbed by the oceans. This equals to 1 million tones every day. When the carbon dioxide disolves into the sea water, the H2O and CO2 molecules combine forming carbonic acid (H2CO3). This changing chemistry is causing our oceans to become more acidic. Over the past 200 years the acidity has risen by 30%. The pH of the oceans has droped by 0.1 pH units (from 8.2-8.1).