Category Archives: Green

For green energy, there’s no place like loam

Diagram of PMFC
Diagram by KVDP

Petroleum use is rife with environmental and security issues, and first-generation biofuels fall well short of carbon neutrality. Moreover, as global food crops literally lose ground to biofuel production, mounting scarcity is driving up food prices, increasing global hunger and political instability.

But what if we could have our rice and burn it, too? What if we could derive energy from crops without killing them, or generate power using plants and land not needed for food, all through the power of microbes?

How Plant-microbial Fuel Cells Work

Hypersonic: Don’t believe the hype

Falcon program’s Hypersonic Cruise Vehicle
The DARPA Falcon Project’s Hypersonic Cruise Vehicle

Imagine a Mach-20 aircraft capable of flying coast to coast in less time than it takes a passenger to clear security; now imagine the jet lag to follow. If the idea still sounds appealing, bear in mind that the most recent attempt at such a plane flew right out of its own skin before ditching into the Pacific.

Welcome to the world of hypersonic flight.

Of course, that was a military weapons platform; contrary to what some aircraft manufacturers’ flacks would have us believe, passenger planes are likely to remain subsonic or supersonic for the foreseeable future – and for good reason.

Could You Commute From New York to Los Angeles in 12 Minutes?

The future ain’t what it used to be

Puzzle pieces
Photo by CrazyPhunk.

As anyone who’s played the ponies, visited Tomorrowland or flipped through an old issue of Popular Mechanics can tell you, predicting the future is no mean feat. Even when we get the broad strokes right, we often misgauge society’s responses. Scientists reveal, inventors dream, engineers build and marketers flog, but human nature has the final say.

Prediction is a sucker’s game, but we have to play: If we don’t predict, we can’t plan. In this article, I look at how the field of futurology developed – and how it works.

How Futurology Works

It’s like Dazzler and Tesla had a baby, and it was a t-shirt

Orange Sound Charge T-Shirt
Photo courtesy Orange

The pages of ThinkGeek teem with techno-tees fitted with LEDs, speakers, DIY artwork, virtual instruments and WiFi meters. Meanwhile, companies vie to gin up greener charging methods for cell phones.

Is it time for a mashup? A cellphone-charging tee? Maybe – but good luck wearing one through airport security.

Can a T-shirt turn sound into electricity?

Lave Ferrous: The secret lives of magnetic soaps

There’s an old run of Peanuts in which Charlie Brown is repeatedly confronted by girls skipping “hi-fi” jump ropes or wearing “hi-fi” bracelets. Each strip ends with Charlie Brown loudly questioning how such an object can be hi-fi, but of course we know the answer: marketing.

Magnetic soap has that sort of ring to it, too. But there are actually good reasons for making surfactants – the group of surface-tension reducing substances to which soap belongs – stick to magnets. Imagine cleaning up an environmental disaster like the Deepwater Horizon oil spill without leaving any of your cleanup materials behind, and you’ll begin to see what I mean.

Of course, that doesn’t exampling how soap can be magnetic in the first place. For that, you’ll have to read on.

How Magnetic Soap Works