EcoWorld - Biofuel

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How Much Land Does Biofuel Require?
Analysis & Commentary: "Land for Biofuel"
(to calculate: click curser on, then off, yellow input cell)


			population of city
			population density (people per square mile)
			water use per day per person (gallons)
			water use per year per person (gallons)
			residential water use of city (million gal./year)
			total residential water use of city (acre feet)
			total land area of city (square miles)

			miles driven per person per year (average)
			average miles per gallon
			auto fuel req'd per year (million gal.)
	42		gallons per barrel
			barrels auto fuel required per year

			barrels of oil per square mile crop per year
			square miles of biofuel crops required

			ratio: irrigation gallons to fuel gallons
			irrigation water req'd for biofuel (million gal.)
			total acre feet req'd for biofuel crop
			ratio: water for biofuel vs. households
			ratio: land for biofuel vs. households

How to use this calculator:
(1) It is sometimes necessary to click on one of the yellow input cells, then click somewhere else on the screen in order to prompt the interactive spreadsheet to calculate and display results.
(2) Yellow cells are input cells - you may enter your own assumptions in these cells.

(3) When you refresh the screen, the original default assumptions will reappear in the yellow input cells.