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2014 Ford Fiesta gets by on three cylinders (pictures)

With the EcoBoost option in the SE-trim Fiesta, Ford cranks 123 horsepower from a tiny 1-liter three-cylinder engine.

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Coming soon: A better, poison-free solar cell

Sure, solar power is clean and green, but to make it more efficient, researchers have had to use some nasty stuff. Until now.

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This arcade machine runs on empty plastic bottles

Coca-Cola engages in an environmentally minded publicity stunt by launching an arcade game that takes bottles, not coins.

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Former RIM CEO to lead Canadian agency on green tech

Jim Balsillie, the former co-CEO of BlackBerry maker Research in Motion, is appointed to chair of Sustainable Development Technology Canada.

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Kleiner Perkins closes $525M early stage fund

New fund will focus on investing in digital consumer, digital enterprise, green tech, and life sciences startups.

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Hacking to save the planet. The team from Divya Energy does last-minute touches before demoing their app for calculating savings from solar panels.

The future of clean tech? Try hacking code

The idea of the "cleanweb," or using IT to deal with energy and resource problems, gains ground among entrepreneurs and VCs at weekend hackathon.

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Energy secretary Steven Chu plots the price trends of competing fuels for generating electricity (PV is solar photovoltaics) at the ARPA-E Summit.

Five things we learned at the ARPA-E Summit

Scientific research and entrepreneurship in clean energy is alive and well at the ARPA-E Summit.

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Peas in a pod: Bill Gates and Steven Chu discuss the pathways to a cleaner energy system.

Gates on energy: IT revolution has warped our minds

Forget a Moore's Law for energy tech, says Bill Gates. Moving the energy system away from fossil fuels takes decades of work and multiple scientific breakthroughs.

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Robots: one of many areas in science and engineering that's accelerating because of better microprocessors and sensors.

From 'bots to EVs--5 predictions for '12 in cutting-edge tech

Innovators are blessed with powerful tools and building blocks to pursue scientific breakthroughs and tackle the world's toughest problems. Here's where the action will be in 2012.

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Green tech still withering in the 'Valley of Death'

In the wake of Beacon Power's bankruptcy, other clean-tech companies with loan guarantees could be in for trouble, too.

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Look out: Fossil fuels may be out-innovating green tech

Cheap natural gas from "fracking" shale rock and other unconventional fossil fuels are making life tough for cleantech.

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In Nest Labs, finally an Apple of home energy

Nest Labs and its Learning Thermostat bring Silicon Valley's strengths in consumer electronics and software programming to energy, a shift that can go a long way to bringing green technology home to consumers.

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