780 million people lack access to an improved water source; approximately one in nine people.
3.41 million people die each year from water, sanitation and hygiene-related causes each year. An American taking a five-minute shower uses more water than the average person in a developing country slum uses for an entire day. The most critical issue facing the American West right now is a lack of water for human activities and irrigation. The Colorado river drains the south-west half of the U.S., it no longer flows into the ocean during the dry season because there is so much water diverted.
4.) Water at night, infrequently and deeply. Plants actually use the most water at night. After collection solar energy all day, plants grow at night consuming water in the process. There is also less water loss to evaporation. Water deeply, but don't water every evening, give the soil a chance to dry out so that the plants are encouraged to grow large root systems searching for water.