Robert Bryce writes in Forbes, “The Real Problem with Renewables”:
The growing oil spill in the Gulf of Mexico has, predictably, resulted in a new chorus of voices calling for increased use of renewable energy sources. But over the past five decades renewables have actually been losing market share.
In 1949 nearly 91% of America’s total primary energy came from coal, oil, and natural gas. The balance came from renewables, with hydropower being a dominant contributor. By 2008 the market share for coal, oil and natural gas, along with nuclear, had grown to 92.5% of total primary energy in the U.S. with the remainder coming from renewables.
Given the raging hype over renewable energy sources, those numbers, which are readily available from the Energy Information Administration, are remarkable. Over the past six decades tens of billions of dollars have been spent on renewable and alternative energy schemes such as wind energy, solar energy, corn and other biofuels, and electric cars. All have aimed at cutting our hydrocarbon use. And yet only nuclear power, which went from zero to about 8.5% of the U.S. primary energy over that time frame, has managed to steal significant market share from coal, oil and natural gas.
In other words, despite these huge investments, renewables’ share of the energy market has been shrinking. What’s happening? While conspiracy theorists may want to believe that Big Oil, Big Coal and Big Nuclear are stifling the growth of renewables, the simple truth is that coal, oil, natural gas and nuclear can satisfy the Four Imperatives: power density, energy density, cost and scale.
The rest here.