"A solar-powered aircraft successfully completed the first fuel-free flight around the world on Tuesday, returning to Abu Dhabi after an epic 16-month voyage that demonstrated the potential of renewable energy.
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"Three attorneys general on Tuesday directly challenged Volkswagen’s defense over its emissions deception, calling the decision to thwart pollution tests an orchestrated fraud that lasted more than a decade, involved dozens of engineers and managers and reached deep into the company’s boardroom."

"Despite praising automakers for recent gains in fuel economy, two federal agencies said on Monday that surging consumer demand for pickups and sport utility vehicles made it unlikely that the industry could meet the government’s ambitious projections a decade from now."

"An airplane powered by energy from the sun arrived on Wednesday in Egypt, the penultimate stop on the first fuel-free flight around the globe."

"California regulators Wednesday again rejected Volkswagen’s plan to fix diesel cars that were programmed to cheat on air pollution tests, saying the proposal lacked enough detail for the state to gauge its effectiveness."

"The Department of Transportation on Wednesday released proposed new spill-response rules for rail carriers carrying crude oil."

"An experimental solar-powered airplane has left Spain for Egypt in the penultimate leg of its globe-circling voyage."

"The race by automakers and technology firms to develop self-driving cars has been fueled by the belief that computers can operate a vehicle more safely than human drivers. But that view is now in question after the revelation on Thursday that the driver of a Tesla Model S electric sedan was killed in an accident when the car was in self-driving mode."

"Volkswagen has agreed to pay up to $14.7 billion to settle claims stemming from its diesel emissions cheating scandal, in what would be one of the largest consumer class-action settlements ever in the United States."

"The single most effective action that most Americans can take to help reduce the dangerous emissions that cause climate change? Buy a more fuel-efficient car."