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.
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.
In the wake of Beacon Power's bankruptcy, other clean-tech companies with loan guarantees could be in for trouble, too.
Cheap natural gas from "fracking" shale rock and other unconventional fossil fuels are making life tough for cleantech.
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.
Famed technologist spends his time investing in green tech where he's seeking riskier technologies with the potential for a big gains.
With political paralysis and the turmoil of Solyndra in Washington, states are taking the lead on green technology action, pitting individual states against other countries.
analysis Political furor over the Solyndra bankruptcy has dealt a body blow to the idea that the government should try to help clean tech start-ups through the costly "valley of death" to commercial viability.
Green-tech startups are splitting between those which swing for the fences and others who just try to hit safely but there's a need for both types to foster innovation.
Famed tech investor Vinod Khosla says green tech will succeed when entrepreneurs follow their vision for disruptive technologies rather than expect consumers to pay a premium for green products.
Defense Department policy shifts toward using more clean energy in order to increase national security and save money, which could have far-reaching effects, according to Pew.
Green-tech incubator shows interest in variety of startups from window treatments to biodiesel.
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