Biofuel

This spring, the Eagle County Regional Airport near Vail, Colorado, began offering the fatty jet fuel sourced from unwanted livestock tallow. It's a so-called sustainable aviation fuel with a lower carbon footprint.

The U.S. Department of Energy defines renewable natural gas as a "pipeline-quality gas that is fully interchangeable with conventional natural gas." The…

An experimental Microsoft Data Plant in Cheyenne, Wyoming is the first data center in the country to be powered solely by a wastewater treatment plant…

On a windy August day outside of Fort Collins, three Colorado State University students crouch in a field, harvesting a crop by hand. The plants in the…

Miscanthus, a relative of sugar cane that looks like bamboo, could be the Midwest’s next energy crop. But in a region dominated by corn and soybeans, it…

A Brooklyn waste treatment plant has become an unlikely lab for an ambitious effort to turn millions of tons of food scraps from New York City's apartments and restaurants into renewable energy.

Synthetic biologist Jay Keasling has already taught yeast to make the leading anti-malarial drug. His next project takes the technology a step further, using yeast to turn plant waste into diesel — and maybe gasoline and jet fuel, too.

Estonia now has the world's first nationwide electric car charger network. What would the U.S. have to do to make a similar leap?

Land that isn't in good enough condition to grow crops could be used to produce substantial amounts of liquid biofuels, a new study claims. But there are many concerns about the study, and about the future of advanced biofuels in the U.S. and abroad.

Wind isn’t the only alternative energy industry to get a boost from the Fiscal Cliff deal. Also included is a tax credit for algae growers encouraging…