地10週

Only about 0.024% of the earth's vast water supply is available to us as liquid freshwater in accessible groundwater deposits and in lakes,rivers,and streams.The rest is too salty for us to use ,is stored as ice,or is too deep underground to extract at affordable prices using current technology

廣大供水量中，只有0.024%的淡水在湖，河，溪提供我們使用。其餘的部份不是鹽份太多，或是存在冰山中，要不就是太深導致我們沒有足夠的資金和技術去抽取。