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With no one buying new equipment, solar companies are looking to make the best of existing technology.
What’s changed and why?
Taking on established battery makers and making electric vehicles mainstream will require far more radical advances.
A study identifies early-stage technologies that could be combined to cut the cost of solar panels in half.
Volvo, Tesla, and dozens of researchers are using creative battery designs to make electric vehicles lighter.
No matter how well they’re engineered, hydrogen cars offer no real answer to the imminent threats posed by global warming.
Oil from microorganisms could help ease the nation’s energy woes.
Moving too quickly on alternative fuels could backfire, says one expert on ethanol fuels.