Starting small, Beijing has reserved a 1 km swathe on the capital’s fringe for parkland and recreation. It may not seem like much, but remember that Beijing has phenomenal development pressure, soaring land prices and not much more land to work with.
Author: Cam Proctor
Windbelt
Conventional wind turbines don’t scale down well—there’s too much friction in the gearbox and other components. So poor, remote communities don’t have any way to harness the power of the wind. Till Shawn Frayne, a 28-year-old inventor based in Mountain View, Calif., saw the need for small-scale wind power to juice LED lamps and radios in the homes of the poor. Frayne’s device, which he calls a Windbelt, is a taut membrane fitted with a pair of magnets that oscillate between metal coils. Prototypes have generated 40 milliwatts in 10-mph slivers of wind, making his device 10 to 30 times as efficient as the best microturbines. Popular mechanics has a good article about the device here.
This message will disappear in 24 hours
Scientists at Xerox have developed an ink that will disappear from printed paper in 24 hours, allowing the paper to be reprinted and reused again. The ‘disappearing ink’ is actually not an ink at all, but a temporary discoloration of light sensitive molecules known as photochromes. A sheet of paper is coated with these molecules (on both sides) which change color in response to ultraviolet light. After printing, the ‘ink’ starts to revert back to its natural state due to heat provided by the surrounding air. The paper itself is no more expensive than a regular page, costing about 0.5p per sheet.
The technology, which will not be commercially available for several years, will reduce the amount of energy required to print a single page by a factor of 200 – from just over 200kJ (which would power a 75W light bulb for an hour) to 1kJ (which would power the bulb for just 18 seconds), Mr Smith said. A recycled page uses about 110kJ of energy.
Got Radioactive Waste?
If you do have radioactive waste, i.e. any country with nuclear power, you probably have a really, really good plan to store that waste for millions of years. No? Well then you might be interested in transmuting the waste into different form that has a half life of 25 minutes. Using a high-powered laser, gold and some physics I don’t understand iodine can be transmuted making the material safer. If the process could be scaled up and cheaper it could pose an alternative to Yucca Mountain.
British scientists have “transmuted” iodine-129 into iodine-128 with a high-powered laser. Now, dropping one neutron might not seem like a big deal, but the half-life of iodine-129 is 15 million years while the half-life of iodine 128 is 25 minutes.
Paint to Electricity
I don’t propose to understand how this works but apparently Ford is planning to capture the paint fumes from their Oakville plant to power a fuel cell that will convert the fumes into electricity! I knew paint fumes were strong stuff but who knew they could power a 300 kilowatt fuel cell completely eliminating NOX and reducing CO2 by 88%? I’ll tell you who knew, Ford knew.
“The Oakville installation is the first of its kind in the world to harvest emissions from an automotive facility for use in fuel cell,” said Kit Edgeworth, Ford’s abatement equipment technical specialist for Manufacturing. “It is the greenest technology and offers the perfect solution to the industry’s biggest environmental challenge traditionally.”