Category Archives: Alternative systems

Impress all your air-breathing friends with a car that runs on air

Reblogged from Grist

Look, down on the ground! It’s an orange mole with no face! It’s a Weeble that says “air” on the side! It’s a M&M with wheels! No, it’s an Airpod — a car that runs on compressed air.

Certainly it’s weird-looking, and if The Fast and The Furious is your favorite movie, you won’t be too psyched about this car. Also it’s made by the folks at Tata who are just always making these weird tiny cars and it’s like guys, enough already with the tiny cars! But the Airpod has some pretty cool features: It costs less than $1.50 to fill it up, and a tank will take you 125 miles, at top speeds of 43 MPH. Also, by “tank,” I mean a tank of COMPRESSED AIR. It runs on air! We can’t really stress that enough.

Now what you’re thinking now is, OK, seems cool, but is this for real? Apparently it is. It’s in its second phase of testing. So when can you buy one of these things? In the “near future,” at a cost of about $10,000. Now that we’ve got you excited, here’s the best part: You drive it with a joystick. And if anyone laughs at you, you can just shout out the window, “I spent $1.20 on fuel today. What did you spend?”

Original source

Vertical Greenhouse…an idea whose time has come

Hat tip to Good Environment


The future of urban farming is under construction in Sweden as agricultural design firm Plantagon works to bring a 12-year-old vision to life: The city of Linköping will soon be home to a 17-story “vertical greenhouse.”

The greenhouse will serve as a regenerating food bank, tackling urban sprawl while making the city self-sufficient. Plantagon predicts that growing these plants in the city will make food production less costly both for the environment and for consumers, a key shift as the world’s population grows increasingly urban—80 percent of the world’s residents will live in cities by 2050, the United Nations estimates. “Essentially, as urban sprawl and lack of land will demand solutions for how to grow industrial volumes in the middle of the city, solutions on this problem have to focus on high yield per ground area used, lack of water, energy, and air to house carbon dioxide,” Plantagon CEO Hans Hassle says.


The greenhouse is a conical glass building that uses an internal “transportation helix” to carry potted vegetables around on conveyors. As plants travel around the helix, they rotate for maximum sun exposure. Hassle says the building will use less energy than a traditional greenhouse, take advantage of “spillage heat” energy companies cannot sell, digest waste to produce biogas and plant fertilizers, and decrease carbon dioxide emissions while eliminating the environmental costs of long-distance transportation. And growing plants in a controlled environment will decrease the amount of water, energy, and pesticides needed.
The greenhouse, which will open in late 2013, is already serving as a model for other cities—Plantagon hopes to install the transportation helix technology in regular office buildings around the world, eliminating the need to build entirely new structures. The tallest models even have a name: Plantascrapers.