ES 200 Study guides, Class notes & Summaries

Explain what "proxies" are and why they are needed. - something measured that can be related to the temperature under which it formed. Give examples of proxies that can be used to estimate past temperatures - Proxies include: tree rings, pollen, oxygen isotopes, and stomata in fossil plants. What are stomata and how are they used in climate research - More Stomata=Cooler Temp Which oxygen isotopes are used for climate research. How exactly do they differ? - 18O and 16O . 16O accounts...

Shortcomings of the agri food system - 1) Reliance on market as sole organizing principle 2) Weak policy, profit seeking food companies 3) Declining share of food in household budgets (cheap food) 4) Calls for increased productivity and technological solutions by affluent populations: more food but people who need it dont get it What does the Water footprint of food describe - How much water is needed for different food. Meat and dairy very high What are the 4 features of a sustainabl...

"Consumed" water (aka water consumption) is water that has been withdrawn from its source but then: - is not returned to the original source. A major theme for the solution to many problems of environmental science is: - input reduction About _____% of the water on the Earth is saltwater. - 98% Agriculture accounts for about _____% of the use of water worldwide. - 70% Each of the following is a use for dams, except: Select one: a. create hydroelectric power. b. minimize flood damage...

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