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Aerospace companies are working on hybrid electric airplanes, and the earliest versions will likely arrive before the end of the decade.
A novel fuel-injection system achieves 64 miles per gallon.
Cars that park themselves and automatically convoy with other cars could reduce congestion and emissions.
HTML5, which enables Web pages to mimic conventional software, also introduces new security problems.
The car is an engineering achievement, but it could easily be even more appealing.
The find could ease U.S. dependence on Chinese supply, but critics consider the announcement premature.
Alternative approaches replace the battery with compressed air or a flywheel.
Increasing mileage standards to 54.5 mpg won’t require major new technologies, say experts.
A GM-funded bus could reduce transit agencies’ fuel bills by 80 percent.