Green Options

Nanotechnology seems to be invading all facets of modern life, from the pills you take to the batteries that power your iPod. Pretty soon, carbon nanotubes may even filter your water.

Researchers at the Bhabha Atomic Research Center in India are investigating the hollow carbon fibers as a potential water filter. They believe the unique chemical properties of nanotubes mean that only water molecules can pass through their interiors, while toxic metal ions, viruses, and bacteria cannot.

Editor’s Note: This post was originally published by the Stanford News Service in December 2007.

Last December, researchers at Stanford University found a way to use silicon nanowires to store 10 times the amount of energy of existing lithium-ion batteries. A laptop that now runs on battery for two hours could operate for 20 hours, but more importantly, this technology can be applied to electric vehicle batteries.

The breakthrough is described in a paper, “High-performance lithium battery anodes using silicon nanowires,” published online Dec. 16 in Nature Nanotechnology. The paper was written by Yi Cui, assistant professor of materials science and engineering, his graduate chemistry student Candace Chan, and five others.

According to Cui: “Given the mature infrastructure behind silicon, this new technology can be pushed to real life quickly.”

There’s a lot of hype out there about new technologies that will “change everything”. Sometimes it’s nice to sit back and “smell the roses”. In that spirit, here are five plants with surprising super powers - they have provided a boost to technological innovation or invention, often with a green lining.

Algae and Biofuel

If you keep track of the news, algae should already be on your radar. Depending on your favorite species, algae can be eaten, burned for heat, or used to produce hydrogen, methane, biodiesel, or plain old fertilizer. Algae is so prolific, and comes in so many varieties, that it’s actually a chore to isolate your preferred species for cultivation out of a water sample from the wild. The best part is that algae soaks up the sun and lots of CO2 to work it’s magic. That’s two forms of renewable energy used to produce fuels or foods (sushi anyone?) in high demand.

An algaculture biodiesel plant is already in operation today, happily churning out 4.4 million gallons of algal oil per year. That may not sound like a lot, but as the first operational algae oil factory, you can bet they’ll make enough money to build bigger. Other companies are also in the game to make algae the biggest thing since oil. As a renewable source of fuel, algae is becoming one of many solutions to our energy problems. Not too shabby for pond scum.

Here’s a look at a few interesting headlines as the world deals with the food crisis and debates on food technology.

Food Aid Also Gives a Helping Hand to GMO Agribusiness
As countries around the world try to grapple with the food crisis, the Bush Administration’s The $770 million aid package causes a bit of a controversy by including language that would promote the use of genetically modified crops in food-deprived countries. (Chicago Tribune).

Agribusiness Profits Rise Dramatically Alongside Food Prices
An article in The Independent discusses how major players in the agriculture industry are enjoying record increases in profits, doubling in a three month period in some cases, from both the demand for food and biofuel. Investor speculation plays a significant part in the profits, as well as in driving up food prices. (The Independent).

More issues and updates.

How much do Americans know about nanotechnology in the products they buy? According to the Project on Emerging Nanotechnologies, about as much as you could measure on a nanoscale … which is to say, a very, very little amount.

That’s part of the reason the Project on Emerging Technologies got started in the first place. Established in 2005 by the Woodrow Wilson International Center for Scholars

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Molecular gears: Image courtesy of NASAThe more I read, the more I come to the conclusion that one of the big problems threatening the environment — and ourselves — today is one created by the gap between our knowledge and our wisdom. Our access to information and our technological advances continue to accelerate at mind-numbing speed, and our ability to use that knowledge wisely and responsibly can't keep pace.

It was hard

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by Ecotality blogger Bill Hobbs. Originally published today, April 6, 2007

If solar power is going to play a significant role in the energy equation of the future, there must be advances in technologies to store that power and more investment by manufacturers, concludes a new federally funded study by University of Massachusetts Amherst scientist Erin Baker. But in New Zealand researchers have developed new solar energy-collecting dyes that promise to make solar energy

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