Chapter 1-2 notes

Chapter 1-2 notes - CHAPTER 1: Why We Study Earth Spaceship...

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CHAPTER 1: Why We Study Earth Spaceship Earth What We Need - Ability to grow food - Surface Stability - Closed cycles - “How to” manual Sustainable Development - Development that meets the needs of the present w/o compromising the ability of future generations to meet their own needs (if you eat all the chips replace them) o Manage natural resources o Prepare for natural disasters o Reduce risk from natural disasters o Repair environmental Damage o Maintain habitable environments Natural Resources - Resources vs. Reserves o Reserves: something you have and have access to but tuck away; you know about and can get to o Resources: known but not recoverable or hypothetical resourse Resources Renewable Vs. Nonrenewable - Rates of production differ o Renewable: Produced by natural processes at a faster rate than the rate it is used o Nonrenewable
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If you use it faster than you can produce it; produced by natural processes at a slower rate than what it is used Energy Use through History - Most energy use is eastern half of North America. - Energy has increased greatly over the last 150 yrs - Over years oil has biecome a larger part of our energy Earth’s Resources Raw Materials Stone sand and gravel Mineral Resources -metals are found in common rocks and minerals -deposits w/ large amounts of metals are called “ores” -recycling as a source of metals Missouri Lead Belt -most concentrated lead deposit in world . Water 1.46 billion cubic km of water on earth 96% is salt water 3% is in glaciers and ice caps Only 1% is liquid freshwater! o Most of it is in groundwater - Total freshwater use in US is 6000 liters per day per person o Only 250 liters/day per person is for domestic use! - 35% is for agriculture - 53% is for industries
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- 12% is consumption, sewage, everything else - Water use is higher per person in the west where there is less water - Today there is 170,000 wells - 6 billion cubic meters is removed by pumping every year
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Chapter 1-2 notes - CHAPTER 1: Why We Study Earth Spaceship...

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