New York Times: Here is another consequence of rising carbon dioxide emissions: the oceans are getting louder. It has long been known that chemical compounds in seawater, including boric acid, absorb sound, as energy from sound waves stimulates certain reactions. As the oceans grow more acidic, a result of increasing absorption of atmospheric CO2, the seawater chemistry changes, resulting in fewer reactions and less acoustic energy used. That means sounds will travel farther and be louder at a given …