"More than seven-tenths of the planet’s surface is covered with salt water. The world’s seas are becoming more acidic. How much that matters is not yet clear. The sea's well-being, some fear, is under threat from the increasing amount of carbon dioxide in the atmosphere, a consequence of industrialisation. This concern is separate from anything caused by the role of CO2 as a climate-changing greenhouse gas. It is a result of the fact that CO2, when dissolved in water, creates an acid." (Quoted from article)