Silicon shortages drove up prices, but supplies are now increasing.
When a 2-miles-per-gallon improvement is better than improving by 16 miles per gallon.
The batteries weren't at fault. Plug-ins are still a good idea.
Why we shouldn't get excited by the latest hydrogen cars.
Rain and floods in the corn-growing Midwest could drive up the costs of producing the biofuel.
A floating wind turbine is planned for 10 kilometers off Norway.
A 1.4 million gallon demonstration-scale plant will use waste biomass to make biofuel.
A missing generation of oil workers will make ramping up supplies tough.
A cheap polymer material increases the power output of methanol fuel cells by 50 percent.