Includes index. Have you ever noticed that the water you drink is a liquid that has no color, no taste, and no smell? It’s also the most important liquid on Earth ― nothing on the planet could live without it. Did you know that most of Earth’s liquid water is saltwater found in the oceans, which provide a home for millions of plants and animals? Freshwater is what humans need to survive, and most of it is bound up in ice.
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