This is the planet we still know so little. We call it Earth but less than 1/3 is land, over 2/3 is water and we use that water as a dumping site for our waste and as if it's an inexhaustible "horn of plenty" for humans. Our most important ecosystem is on the verge of collapse unless we act now. At this very moment the main problem with the oceans is that they're getting emptier and emptier. If we don't do anything then we face one of the biggest disasters in history of mankind.
