You really can drive across the country on algae--and a 700-pound battery pack--or so proved the crew behind the documentary Fuel . Embarking on September 8 and pulling into New York City today, just in time for the film's premiere, the Algaeus covered 3,750 miles.

"It got 147 miles per gallon in the city," says Fuel director Josh Tickell of the converted to plug-in Prius hybrid that he drove on a mix of battery power and algae fuel blended with conventional gasoline. The Algaeus did less well on the highway: 52 mpg, because of the lack of regenerative braking that recharges the battery, among other things.

Many have wondered what Better Place's vaunted automated battery changing stations might look like. So the company, a would-be pioneer in electric cars and their attendant infrastructure, has released a slick video showing how it’s done at a demonstration site in Yokohama, Japan.

Swapping out the discharged battery from an electric Nissan SUV for a fully charged one took slightly more than a minute, according to the video, or less time than it might take you to gas up your car. And you wouldn't even have to get out (talk about full service).

DETROIT-- The North American International Auto Show held this week was positively electric in an economically dark world in which buyers shun gas guzzlers and manufacturers struggle to go green as well as convince consumers to fork over tight funds. There was less talk of biofuels and almost no talk of hydrogen than in previous years, with the emphasis instead on quick environmental fixes that can be implemented within five years—if not immediately.

There were three real classes of environmental innovation on display here: traditional hybrids, extended-range electric vehicles, and pure electric vehicles. Every step represents another leap away from the internal combustion engine, a goal that wasn't even a goal a mere three years ago.

Chrysler, Ford and GM are busy using up the $25-billion jump-start they received last month and their economic outlook is far from rosy. But it is the upstarts—in specific, electric car company Tesla Motors—facing the roughest road because they don't have the track record for access to cheap cash.

As the credit markets have seized up, Tesla has been forced to restructure and has entered a "critical phase" financially, according to a company blog post. Tesla will be abandoning Detroit and digging in at its new corporate HQ in San Jose as well as laying off an unspecified number of its 250 employees. Its primary financial backer, Elon Musk—whose SpaceX rocket finally took flight, successfully putting a payload into orbit—will also return to the helm of the company, shifting current CEO Ze'ev Drori to the board of directors. He had been in the job for a little less than a year.