Invention special: Green technology
Green inventions to get us off oil, produce clean electricity and fuel, power your iPod by banging your head, and more
As the evidence that humans have altered the Earth's climate and environment for the worst continues to grow, the race is on to produce technologies that will reverse or slow those ill-effects.
This week New Scientist looks at some recent patent applications that hope to be part of a new, greener, world.
Osmotic power generation
Osmosis – the way water automatically flows from a weak solution into a stronger one – is a fundamental to biological life. Now the process could also generate our electricity.
Grow-your-own biofuel refinery
Biodiesel has potential as a sustainable fuel that can be blended with or even replace fossil-fuel diesel. It is made from long-chain fatty acids derived from vegetable oils or animal fats.
The energy harvester consists of a small flywheel in a magnetic field that rotates when the head shifts, thus generating current.
Inventions - read about all the most exciting, bizarre and terrifying new patented ideas in our continually updated special report
Energy and Fuels - Learn more about the looming energy crisis in our comprehensive special report.
The first comment on the article was amusing- about the nod-powered headset:
By Sid Rat
Tue Sep 30 14:28:24 BST 2008
I wonder if a heavy-metal rock concert could provide enough power for the bands' amplifiers.