Green Tech

If you're a city dweller who dreams of moving beyond growing mint on your kitchen windowsill, you can impress your friends with something more: oyster mushrooms.

As UC Berkeley students, the co-founders of "Back to the Roots" discovered they could grow mushrooms using recycled coffee grounds. Now their DIY mushroom kit sells at grocery stores across the country.

The pair developed a "grow it at home" kit where the soil is made from used coffee grounds and mushroom spawn, or seed, gets mixed in. Co-founder Nikhil Arora tells SmartPlanet how the idea grew and about … Read more

While some states are still rolling out rebates for the purchases of new hybrid and plug-in vehicles, the Washington State Senate on Saturday passed a new law to make electric car owners pony up an extra $100 annual fee.

The reasoning behind the law is that although electric vehicles use the same roads as gas-powered vehicles, the owners don't pay gas taxes because they drive right past the pumps.

The Associated Press reported that Washington's gas tax, which is 37.5 cents per gallon, is the state's largest source of transportation dollars.

The bill, sponsored by Sen. … Read more

Startup Amyris has hit a speed bump producing chemicals and fuels from sugar cane, another sign of the technical difficulties biofuel companies have had.

In an earnings call last week, Amyris CEO John Melo said the company had trouble maintaining reliable production of its operations in Brazil. "We showed conclusively that our technology does work at scale, but also learned that it takes time to translate from peak yield levels in the lab to maintaining those yields over longer operational periods in the field," he said on a conference call with investors last Thursday.

As a result, Amyris … Read more

Students at the Bochum University of Applied Sciences in Germany are going on the road trip of a lifetime.

In a two-seater electric car powered only by the sun, a team of students plan to circumnavigate the world. These German students designed the SolarWorld Gran Turismo (SolarWorld GT) and competed in the 2011 World Solar Challenge in Australia, which kicked off their round-the-world tour. After they crossed the finish line in Darwin, Australia, they decided to keep going and motored on to Sydney and then to New Zealand.

With a lift from DHL, the SolarWorld GT was transported across the … Read more

Commentary Tesla Motors is helping destroy the notion that electric vehicles are green cars with unfortunate compromises.

The company last night unveiled the Model X, a sleek-looking cross between a minivan and SUV with clever "falcon wing" doors and a new electric all-wheel drive system. People can start placing reservations tomorrow for the Model X, which is expected to be available late next year with prices in the $55,000 to $75,000 range before tax incentives and rebates.

Beyond making an attractive crossover, Tesla has shown how electric vehicles open up new design possibilities. The Model X … Read more

LOS ANGELES--The highlight of the Model X introduction, Tesla's SUV, was not the electric power train, but what the company calls the falcon-wing doors.

The manufacturer being Tesla, it was a given that the Model X would be an electrically driven vehicle. So during a preview for a small group of journalists at Tesla's design center in Los Angeles, Tesla CEO Elon Musk focused on the innovative side doors.

These doors lift up from the sides, then hinge in the middle before gaining their full height. Unlike gull-wing doors, Tesla's doors can open in much narrower spaces. Musk said they give the Model X the largest door openings of any passenger car. Impressively, he was able to stand in the car, his head underneath the open door, without crouching.… Read more

SolarReserve has completed the central point of a solar project that uses molten salt storage to deliver power to the grid well after the sun has gone down.

The startup company today said it has completed the 540-foot tower of the Crescent Dunes Solar Energy Project near Tonopah, Nev., which is expected to start delivering 110 megawatts by the end of 2013. When it comes online, it's projected to have 10 hours of storage, the longest full-load storage capacity for a solar plant.

Adding storage turns solar into a continuous power source and allows project developers to earn more … Read more

From 2003 to 2010, NASA satellites systematically measured all of Earth's melting glacial ice--the results added up to 4.3 trillion tons of water and a global sea level rise of half an inch.

Put in perspective, that's enough ice to bury the entire U.S. 1.5-feet deep.

These calculations are detailed in a new study released today by a team of scientists at the University of Colorado. The scientists used satellite measurements from the NASA Gravity Recovery and Climate Experiment (GRACE), which launched in 2002 and focused on how melting ice from glaciers and ice caps … Read more

Honda's first all-electric vehicle is hitting the streets a little early.

The Honda Fit EV debuted at the Los Angeles Auto Show in November 2011, and it's expected to be available for lease this summer. However, Honda announced that Google and Stanford University got a special early delivery of the tiny EV this week. … Read more