Report: Most biofuels aren't green

Biofuels were under the microscope all summer in the U.S. due to drought-prompted concerns about the bite they can take out of food supplies.

Gasoline 'more green than many biofuels'

Most biofuels are worse for the environment than gasoline, according to the Swiss Federal Laboratories for Materials Science and Technology (Empa).

World's smallest car is a billionth the size of yours

Dutch researchers say they've created the world's smallest electric vehicle - consisting of just a single molecule.