 This is U.S. energy use in the year 2010 from the Energy Information Agency of the United States government, and what you'll notice is that renewables over here make up about 8% of the mix, similar to nuclear used for electric power, and then you have all of these different fossil fuels, coal 21% dropping a little bit, natural gas 26% and rising a little bit, and the biggest thing has been reliance on petroleum, what's usually called oil. If you add these together, it's 84%. For the world, for most other countries, this dominance by fossil fuels also happens in those other countries, and for the world as a whole. We really are fossil fueled.