Chapter 1NumbersThe goal of this manual is to help you learn how to make difficult scientific estimates ofserious import. If successful, the student by the end ofthe course will be able to answerquestions such as the questions listed belowin a manner which relies significantly less onotherpeopleandmoreonone’sownself.1. Isitpossibleforhumanenergyneedstobemetbyrenewableenergysources?2. Ifwedocontinuetousefossilfuels,howplausiblewoulditbeforustoscrubtheearth’satmospherecleanofallexcessCO2?3. Howenergyefficientisafarm?4. ThereiscurrentlyadebateinWashingtonastowhetherweshouldstayinAfghanistanforanotherfewyears. Basedonyourownpersonalvaluesystem,howefficientauseofresourcesisthis?Wewillgettothegoalofansweringquestionssuchasthisonebybreakingtheprocess
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