Which reservoir in the hydrologic cycle contains most of the Earth's mass of liquid fresh water?

Question

Quizplus · Accepted Answer

Groundwater contains approximately 30.1% of the Earth's mass of liquid fresh water, making it the largest reservoir of fresh water on Earth. The oceans contain approximately 97.2% of the total water on Earth, but only about 2.5% of that is fresh water. Rivers and lakes only make up a small percentage of the Earth's total water supply, and the atmosphere contains only a tiny amount of water vapor.

Which Reservoir in the Hydrologic Cycle Contains Most of the Earth's