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Supersonic aircraft: Twice as nice, or double the trouble?

Startups aiming to develop supersonic aircraft see a bright future, despite the high carbon intensity of their designs. But given evidence that supersonic aircraft will burn seven times more fuel per seat than subsonic aircraft, is there really room for supersonics in a net-zero future?

New legislation in Chile shows climate leadership

Chile’s recent spate of progressive legislation on transportation and energy is establishing the country as a climate policy leader among Latin American and other emerging economies.

Live from New York, it’s vehicle efficiency!

What role are high-volume 2014 models going to play in automakers’ efforts to meet new CAFE standards? Well, the new sedans are already greatly outperforming the CAFE targets, two years early. And they’re all doing it in slightly different ways.