BPK 140 Chapter Notes - Chapter 15: Public Water System, The 100-Mile Diet, Tap Water

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 140
• Professor: Stephen Brown

Document Summary

Concept that earth seems large to us as individual humans, it has finite amounts of land, air water, food, energy and other resources. Our planet is like a spaceship, a semi-closed system. Body loses water from skin, especially from moist membranes of our nose, mouth, airways and lungs. We need to drink at least 1 litre of water every day. Requirement increased by heat, physical exertion, lactation (mother producing milk for baby), and diarrhea. We use hundreds of liters of water per day, ex. Drinking water is drawn from river, lakes, reservoirs (artificial lakes made by dams), springs (underground water comes to surface), and wells. Water cycle: evaporation collect in clouds precipitation repeat. Our water is free, but there"s a lot of costs to maintain water, most factored into property taxes. When water appears to be free, people use it more extravagantly. Tap water is no less healthy than bottled water.