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.
Harmony with nature
16. Without water, there is no life. Humans and all living things have the right to water, but water also has rights. All States and peoples worldwide should work together in solidarity to ensure that loss of vegetation, deforestation, the pollution of the atmosphere and contamination are prevented from continuing to alter the hydrological cycle. These cause desertification, lack of food, temperature increase, sea level rise, migrations, acid rain, and physical-chemical changes that can cause ecosystems to die.