ScienceThe Tomorrow Today Viewer QuestionTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience06/08/2015June 8, 2015Viewer Tumaini Matinda from Tanzania wants to know: If two-thirds of the Earth is covered with water, why is there so little that's fit to drink?https://p.dw.com/p/1FcTYAdvertisement