Water is just about everywhere on Earth-in the oceans aciers, the hydrosphere comprisesabout 136 billion cubic kilometers million cubic miles, of 97.2 percent, is stored the global oceans tce sheets and glaciers account another 2.15 percent, leaving only 0.65 percent to be divided among lakes, streams, groundwater, and the atmosphere(see Figure 1.11, p. 12). Although the percentages of Earth's total water found in each of the latter sources is but a small fraction of the total invento the absolute quantities are great