The document discusses water usage from different perspectives such as how much water is used to produce common items like tea, jeans, and t-shirts. It provides statistics on water usage for different countries and regions, finding that China, India, and the US use the most total water annually but water usage per person is higher in the US than India and China. The document also notes that average water usage varies greatly around the world, with people in Central Africa using only 2% of the amount used by those in North America.