enviro - Ch7 SG - Bradley Clark Ch 7 Human Population Study...

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Bradley Clark Ch. 7 Human Population Study Guide 4 principles of Sustainability: 1. Reliance on Solar Energy : 2. Biodiversity: ← Functional ← Genetic ← Species ← Population 3. Population Control: Taking out the animals that aren’t as strong 4. Nutrient Cycling: You eat something that ate something that ate something that ate something 5 steps on the Pathway to Sustainability: 1. There is natural capital 2. We degrade natural capital 3. We come up with solutions 4. With solutions there are tradeoffs 5. Individuals matter 3 contributions to the exponential growth in human popula- tion in the past 200 years: 1. Humans developed the ability to expand into diverse new habitats and different climate zones 2. Emergence of early and modern agriculture allowed more people to be fed per unit of land area 3. We have managed to put off reaching the limits of disease, food, water, and energy supplies on overall population growth. We have used better sanitation and developed antibiotics and vaccines to help control infectious disease agents, and we have tapped into concentrated sources of energy (fossil fuels). These changes allowed births to exceed deaths.
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