Auto CO2 emissions 40% higher than claimed: report

Carbon dioxide (CO2) emissions from cars registered in Europe in 2014 were 40 percent higher on average than their manufacturers claimed, said a report prompting calls Wednesday for an investigation.

What we know: the Volkswagen emissions test fraud scandal

Just one week ago Volkswagen was a company oozing confidence, the world's best-selling automaker with a global brand that appealed to car buyers seeking trustworthy German engineering at an affordable price.

Boeing completes test flight with 'green diesel'

Boeing announced Wednesday that it completed the first test flight with "green diesel," which offers potential for reducing greenhouse gas emissions in aviation.

KLM flies world's first 'passenger flight on biofuel'

A Boeing 747, one of four engines powered by a 50-percent biokerosene mix, circled the Netherlands for an hour on Monday for what airline KLM called the world's first passenger flight using biofuel.

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