Hiking equipment
According to Tom Brown, the basic plan for survival is in the order of shelter (including clothing), water, fire, and food. Cody Lundin writes about the "Rule of 3s"; this relates to human survival without basics: three minutes without air, three hours without shelter, three days without water, or three weeks without food.
End Water Poverty
End Water Poverty is an international campaign calling for sanitation and potable water for all. UN figures show that worldwide, 2.6 billion people live without anywhere to excrete in a sanitary manner and over one billion have no safe water to drink. Over 4,900 children every day from preventable water-related diseases.