The documented search for perpetual motion begins in the 13th century. Villard de Honnescourt drew designs for such machines at that time. There may be earlier designs, but perpetual motion is closely linked to machines, especially rotating machines, and machines are neither widespread nor very sophisticated before this time. Before the invention of electric or gasoline motors there were limited ways to supply power to do work. Waterwheels, tidewheels, and windmills supplied power only in certain locations; man and animals supplied all the portable power. People who had no access to a suitable stream, estuary, or windy hill-top sought alternatives, and inventors attempted to supply them with perpetual motion machines. The search continues to the present day. More recent designs for perpetual motion appear in response to crises, like the energy crisis, or high costs of fuels, or some poorly understood technological need.
WASHINGTON – The Environmental Protection Agency (EPA) released today its final Renewable Fuel Standard (RFS) renewable volume obligations (RVOs) for 2018. The agency finalized a total
For the United States, in 2010, petroleum products represented 36.2 percent of its fossil fuel mix, coal 21.2 percent, and natural gas 23.8 percent (People and Planet, 2008). Even with the heightened focus on renewable and nuclear power sources, experts predict that fossil fuels will continue to supply the vast majority of the world’s energy needs for much of the next century. Within the fossil fuel group, petroleum products accounted for 33 percent of global consumption, coal for 30 percent, and natural gas for 21 percent in 2011 (MacAlister, 2012) (FAQs Natural Gas, n.d.).
WASHINGTON – The Renewable Fuels Association (RFA) today released an easy-to-use online calculator to help consumers understand how much money they can save by choosing ethanol blends like
We are the leading trade association for America’s ethanol industry, working to advance development, production & use of ethanol as a beneficial renewable fuel.
Which brings us to the third cause. There is, now, an elsewhere to head. In the past six years, the price of a solar panel has fallen by eighty per cent. For years, the fossil-fuel industry has labored to sell the idea that a transition to renewable energy would necessarily be painfully slow—that it would take decades before anything fundamental started to shift. Inevitability was their shield, but no longer. If we wanted to transform our energy supply, we clearly could, though it would require an enormous global effort.