enviro - Environment Notes Movies to watch for enviro...

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Environment Notes 21:02 Movies to watch for enviro Soylent Green Blade Runner 1984 Dr. Strangelove Mad Max/Road Warrior Planet of the Apes Captain James T. Kirk Jared Diamond—causes of collapse Environmental damage Climate Change Loss of trading partners Warfare Failure of political and social systems to effectively respond to challenges Environment Life has existed on earth for 3.8 billion years Earth well suited for life Water covers ¾ of planet – 99% not drinkable Habitable temperature – moderate greenhouse Moderate sunlight Atmosphere provides oxygen and carbon dioxide – ozone filter high energy UV
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Soil provides essential minerals for plants *But humans are altering the planet—not always in a good way Some views of the environment Utilitarian Viewpoint – the environment exists only to provide services to humans, it has  no other value Deep Ecology Viewpoint – plants, animals, mountains, streams, oceans all have great  intrinsic value independent of human activities Human Impacts on Environment-Population Population: 6.9 billion, growing exponentially 7 billion in October) Expected to add several billion more people in 21 st  century Increase will adversely affect living conditions in many areas of the world Globally, 1 in 4 people lives in extreme poverty (cannot meet basic need for food,  clothing, shelter, health) Difficult to meet population needs without exploiting earth’s resources Gap between rich and poor Highly developed countries (HDC) Complex industrial bases, low population growth, high per capita incomes (UC, Canada,  Japan) Less developed countries (LDC) Low level of industrialization, very high fertility rate, high infant mortality rate, low per  capita income (Bangladesh, Mali, Ethiopia Types of natural resources Renewable Direct solar energy Energy of winds, tides, flowing water Fertile soil Clean air Fresh water Biological diversity (forests, food, crops, fishes)
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Nonrenewable Metallic minerals (gold, tin) Nonmetallic minerals (salt, phosphates, stone) Fossil fuels (coal, oil, natural gas) What does “renewable” mean? There is a stable equilibrium between consumption and replenishment  Using solar energy has no effect on the sun, almost infinitely renewable Ocean fisheries = in collapse due to overfishing, habitat destruction, nutrient run-off, etc. People Overpopulation Too many people in a given geographic area Problem in many developing countries Consumption overpopulation Each individual in a population consumes too large a share of the resources Problem in many highly developed nations -28,000 years ago, Homeo Neanderthalis became extinct in Europe. Larger brains,  cultural/religious practices, buried dead, left tools behind
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This note was uploaded on 03/14/2012 for the course ENST 150 at USC.

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enviro - Environment Notes Movies to watch for enviro...

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