We hear frequently about the critical state of the world’s oceans and marine life in peril. Yet too often, we are left feeling helpless - not knowing what we can do to make a difference. This week, Dave Bill and I delivered an Ocean Stewardship lesson to Nautical Science classes and to the Beijing, China exchange students from RDFZ School about ocean acidification. As the oceans absorb rising levels of carbon dioxide from the air, in turn, the excess carbon dioxide lowers the pH of the water. This absorption of CO2 changes the water chemistry and affects shelled animals and reef building corals negatively.