Anthropological activities affect the balance of our planet. Air pollution is undergoing major changes, primarily global warming, but there is also another no less dangerous one that threatens the oceans and “our tables”. The carbon dioxide presents in the atmosphere in contact with water forms carbon acid and increases its acidity, this happens at a very fast pace and the marine ecosystem is struggling to adapt and for many species that populate it becomes a hostile environment, among these species there are also mussels that are losing the ability to anchor and grow. We will show you what happens with some CHEMISTRY.