ALT A map projection of Earth. Different countries are outlined in shades of grey; various square-shaped regions on top of them are colored in shades of yellow and blue, corresponding to their "Year of Minimum Freshwater Storage" (as outlined in the legend at bottom). Parts of South America and Central Asia have colors corresponding to earlier years, like 2015 and 2016; regions like North America and Europe have colors corresponding to the early 2020s. Credit: Image by NASA Earth Observatory/Wanmei Liang with data courtesy of Mary Michael O’Neill