OLogy Cards > water

There is nothing in the world like water. Without it, our world would be a very different place. Water covers over two-thirds of Earth and makes all life possible. It shapes our planet's surface, carving canyons and moving continents. It works with the Sun's energy to control our climate. And it is essential to our survival, as well as for food, transportation, sanitation, and even power. We need to conserve and protect this precious resource.