The New Ocean by Bryn Barnard

The Earth--our home--is covered mostly with water: the wide, deep, salty and very blue ocean. It regulates our climate in a way that makes life as we know it possible. The huge ocean is full of a vast amount of life. But life in the ocean is in trouble. The ocean is becoming hotter, more polluted and, in places, empty of life. These changes are creating a "New Ocean."