An introduction to our most precious natural resource. In this engaging book, hydrologist Peter E. Black celebrates the wonder of our planet's most precious natural resource. In these brief, nontechnical essays, readers are introduced to water's unique scientific properties, the vital role it plays in Earth's ecology and ecosystems, and the impact it has had on human history, culture, art, law, and economics. At turns educational and inspirational, humorous and reverent, the book also sounds a cautionary note: water is abundant, but it is also scarce. Only three percent of the earth's water is fresh, and only a small percentage of that fresh water is available for human use and consumption. Therefore, it must be managed carefully, and understood, lest we find ourselves with too little, too late.