We want to jump here directly to a graph comparing the different levels of electricity capacity currently generated from oil, coal, natural gas and the rest (nuclear, hydro etc) with the capacity wind power fields, farms need, the cost of investment needed and the land area used.

The assumptions are $1.3 per installed watt – much less than solar for now. And 3.8 acres per 1.5MW turbine – this is only the land used by the actual turbines and utility roads etc. not the actual land required for the field in which land can be used for agriculture or other purposes.

Click here or on the image to see full resolution graph.

The highest level displayed is not that important because it already includes renewable energy and nuclear (the argument about how clean it is and it’s safety are a subject of a separate discussion). Natural gas though not renewable is clean and still in abundant quantities in reserves.  The more important part of the analysis is the lower levels – oil and coal.  Look at how affordable the numbers look. Compare to the money currently the government is spending on trying to jump-start the economy anyway.

The scale is also not impossible to achieve quickly. Wind as solar is an accelerating, fast growing industry.  Just to create the correct impression here of how quickly the first level – oil can be covered – it requires about 56 GW of wind power. Only in 2007 the newly installed wind power is 5.3 GW (see resources used at the bottom). So even at the same rate of investment, construction we only need 10 years to replace oil used for electricity. This is not counting the potential of solar, other renewables and the potential for the very likely accelerated addition of new wind capacity every year.

Resources Used

US Department of Energy
Energy Efficiency and Renewable Energy (EERE)
http://www1.eere.energy.gov/windandhydro/pdfs/43025.pdf

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