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Brazilian researchers report that exposure to magnetic fields increased ethanol yields by as much as 17 percent.
Once thought too polluting, the two-stroke engine makes a comeback in advance of stricter fuel efficiency standards.
Design cuts pollution–but is it practical?
David Victor explains why emissions trading alone won’t be adequate to address global warming.
NASA has quantified the amount of pollution that moves from East Asia to North America.
A supercritical diesel engine could increase efficiency and cut emissions.
A wireless-sensor network to report pollution and traffic comes to Cambridge, MA.