Green Tech

Saudi Arabia wants to spend over $100 billion to build vast solar arrays and reduce its dependency on oil to generate electricity. But desert sandstorms pose a major challenge to keeping solar panels clean and efficient.

Japanese startup Miraikikai is developing a solution to getting rid of this pesky dust and grit: a cleaning robot that doesn't need water.

The firm has produced the Wall Walker wall and ceiling robot, and recently unveiled a prototype solar panel cleaner built with researchers at Kagawa University.

It weighs about 24 pounds -- light enough to be carried by one person -- and measures about 22 inches across. … Read more

If you laid out all the electronics components you've ever owned on the floor, what would it look like?

Maybe something along the lines of Federico Uribe's "Tapete" (carpet). It's fashioned out of thousands of discarded computer and other electronics components.

The Miami-based conceptual artist uses objects from daily life in sculptures that evoke animals, plants, and human figures.

His work "Everybody Gets Screwed," for instance, features busts of people including Marylin Monroe made out of all manner of screws. … Read more

Tuk-tuks are a common way to get around in many Asian cities, but they contribute to urban pollution and high fuel costs.

Tokyo-based startup Terra Motors wants to put more non-polluting vehicles on the streets with an electric tuk-tuk unveiled this week for the Philippines.

The blue and white "e-tricycle" is powered by a lithium-ion battery and can carry six people including the driver. It's just under 11 feet long and is steered with handlebars.

It can travel some 31 miles per 2-hour charge, according to the firm, which is hoping to become the world's top electric tuk-tuk maker. … Read more

The Solar Impulse has defied all expectations in its short four-year life.

First, the solar-powered airplane got off the ground in 2010 and stayed aloft for a total of 87 minutes without using a drop of fuel; then, it completed its first international flight traveling from its home of Switzerland to Brussels in about 13 hours. By its first birthday, the plane met the goal of staying aloft for 24 hours -- flying at night with solar energy captured during the day. It has since completed a 1,550-mile journey from Madrid, Spain, to Rabat, Morocco.

Now, before it embarks … Read more

Scientists cite as a major driver of climate change the large amount of carbon dioxide in the Earth's atmosphere that's created by the burning of fossil fuels. They spend day after day trying to figure out a way to generate power for the world's populations, but at the same time leave a smaller carbon footprint.

Now, researchers at the University of Georgia say they've hit upon a way to take the carbon dioxide in the atmosphere and turn it into useable industrial products. The impact of such a discovery is potentially huge.

The goal is to remove the CO2 directly from the air and turn it into biofuel -- not only helping power the world, but hopefully taking down global temperatures at the same time.

The researchers essentially have created a microorganism that acts like a plant that removes the carbon dioxide from the air and turns it into something we can use. During photosynthesis, plants utilize sunlight, water, and carbon dioxide from the air to create their food source. This would behave in a similar fashion. … Read more

In a tweet mentioning @TeslaMotors, Tesla CEO Elon Musk promised a big announcement on Thursday, and wrote, "Am going to put my money where my mouth is in v major way."

A Tesla spokeswoman told CNET that the company is still working out the place and timing of the announcement. However, she said that Tesla will not be at the New York auto show, which is holding a press preview on Wednesday and Thursday of this week.

After the tweet was posted, Tesla's shares jumped 4.23 percent.

Musk's second sentence in the tweet suggests he … Read more

Last year, Tesla introduced the Model X crossover electric vehicle at its Los Angeles design center, and said it would begin production of the vehicle in late 2013. That production date has been revised, according to Tesla's shareholder annual report, to late 2014.

The report says that Tesla reached its steady state rate of production for 20,000 Model S sedans per year last December. The Model S is built at Tesla's Fremont manufacturing plant.

A Tesla spokesperson told CNET last December that there is a nine-month waiting period for current Model S orders. Tesla's goal is … Read more

When you own an older home, it's common for aging insulation, warped windowsills, and other pesky problems to let the cool or hot air out and drive the energy bill up. To help homeowners locate these weak spots (and for many other uses), Mu Optics created a low-cost thermal imaging camera that allows users to see the world according to temperature -- anywhere in the range of -86 to 285 degrees Fahrenheit.

The thermal imaging device features USB charging and battery life of more than 3 hours (an hour for video recording). The optics offer 160x120 resolution -- which may sound very small, but most thermal cameras deliver a similar view -- for pictures and video up to 30 frames per second.

Five live viewing modes enable the owner to see things such as temperature information for a specific area, a thermal and regular camera view blend, and other combinations. Check out some of the neat thermal videos produced by the camera on Vimeo.… Read more

With the flip of a switch Tuesday night, the San Francisco Bay Bridge, already known as one of the world's most amazing bridges, will undergo an epic transformation.

Starting tomorrow evening, anyone looking at the San Francisco side of the Bay Bridge at night will be wowed by the ever-changing swirls, bursts, star fields, and other patterns of the Bay Lights Project, the world's largest LED art installation.

Created by artist Leo Villareal, the project features 25,000 1-inch LEDs strung for 1.8 miles along the bridge's cables that together make up the pixels on what … Read more