Where is most freshwater stored?

• A. In rivers and lakes
• B. In groundwater
• C. In glaciers and ice caps
• D. In the atmosphere

Answer: (C)

Freshwater distribution on Earth is highly uneven, and the largest reservoir is solid water stored on land in glaciers and ice caps. These ice bodies, especially in Antarctica and Greenland, accumulate huge volumes of water and hold them for long periods, making them the biggest store of freshwater. Groundwater sits as the next major reservoir, trapped in rocks and soils and tapped for drinking water and irrigation, but it doesn’t equal the massive volume locked up in ice. Surface water in rivers and lakes represents only a small portion of freshwater, and the atmosphere contains only a tiny amount as water vapor at any given time. So, the reason this option is the best answer is that it points to the largest, longest-term freshwater store on Earth.