Is it feasible?

According to our Red Stack/Green Stack analysis, The United States consumes roughly twice what it can produce.  This seems like it's a resonable goal, however, a lot of our numbers were based on guesswork and generous estimations.  For example, we calculated that we could produce 72.5 kWh/day/person from PV farms.  We got this number assuming we could cover 10% of Arizona with solar panels, which probably could never happen.  On the other hand we got a very low number for geothermal energy produced (.14 kWh/day/person) when in reality I'm sure we could find a way to produce more.

One thing we didn't consider when we were making our green stack was the financial cost and the social adjustment a lot of these energy sources require.  Wind turbine technology for example is getting very expensive; over a three year period from 2005-2008 the price for offshore turbines rose roughly 48% to $3.45 million per megawatt while the price for land-based turbines rose 74% to $2.13 million per megawatt.

A social change also needs to be made if we want to reduce our red stack.  While we are starting to produce smaller, more energy efficient vehicles like Toyota's Prius, people are still going to want to drive bigger, gas-guzzling cars.  There is also a general shared opinion among some people that cars like the Prius aren't cool.  We live in a society where bigger is better, and things aren't cool if they are energy efficient.