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This presentation explains trade offs and how to identify and compare "competing goods and services" when making a decision. Included are a variety of practice problems covering a wide range of common trade offs people face. This is a multiple use presentation. I use this mostly as an introduction to situational analysis and decision making in environmental and science issues scenarios, however it can be used in many other circumstances. Used in 7th through college level settings. Can be easily adapted to social and business issues.