The document discusses water use and distribution around the world. It notes that while water covers most of the Earth's surface, only a small percentage is easily accessible. It then outlines major uses of fresh water, with agriculture accounting for 70% globally. Specific water use statistics are provided for the United States, China, and other locations. Challenges around water supply such as depletion of groundwater and the high costs of desalination are also summarized.

1. WATER USE & DISTRIBUTION Environmental Science

4. http://ga.water.usgs.gov/edu/waterdistribution.html Water Supply & Use