Extreme Insulation: Who Needs It Most?
by John Laumer, Philadelphia 
on 11.13.08
(Page 2 of 2)
Anyone who has added extra insulation first!
Would be very interesting to overlay the plant hardiness zone map shown with a population densities map (from Census Bureau) and use the resulting data (from combined layer) to estimate per capita, per zone, average expense for heating versus cooling.
Image credit:Arbor Day Foundation, plant hardiness zone map, adapted to changing climate.
page: 1, 2
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