Chapter 1: Introduction  Understand how natural world works  Understand how human systems interact with natural system  Accurately determine environmental.

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Presentation transcript:

Chapter 1: Introduction  Understand how natural world works  Understand how human systems interact with natural system  Accurately determine environmental problems  Develop and follow a sustainable relationship with natural world

Easter Island Sustainability - A system/process can continue indefinitely without depleting resources used. *no sacrifice to future generations* Stewardship Caring for something that does not belong to you Sound Science Use the scientific method

A. Human population growth More than 6.3 billion people currently last 25 yrs population grew by 2 billion projected that population will be 10 billion by 2050 increase pop → increase need for resources

B. Soil degradation Demand for food destroys the soil erosion minerals in soil are depleted salinization increased use of pesticides Overuse of fresh water

C. Global Atmospheric Changes Global Warming CO 2 produced from fossil fuel burning acts like a blanket around the earth. Plants take CO 2 out of the atmosphere through photosynthesis 6CO 2 +6H 2 O => C 6 H 12 O 6 Ozone depletion Chemicals released from the surface of the earth destroy our ozone shield. No stratospheric ozone, no protection from the UV rays of the sun.

D. Loss of Biodiversity Habitat destruction leads to a loss of many species starting with the plants exact # of species lost is unknown because not all species are identified strong ecosystems need biodiversity % of all prescription drugs from natural resources Wild species keep domestic species vigorous Aesthetics

Rachel Carson was a scientist who wrote Silent Spring in It addressed the growing use of pesticides (DDT) and their unpredicted effects on song birds. Original users of pesticides did not know that the poisons used to kill insects would accumulate in other living things and kill them too. BIOACCUMULATION

More Cool Environmentalist John Muir – Sierra Club Ansel Adams – Photography (Yosemite) Aldo Leopold – Sand County Almanac Henry David Thoreau – Walden Garrett Hardin – Tragedy of the Commons

Ch 2: Ecosystems Levels of organization of matter Universe Ecosphere/biosphere Ecosystems Communities Populations Organisms Cells Atoms