A prominent plant biologist says that biofuels are only one part of a green energy solution.

Much hope for an affordable clean-energy solution has been placed on the potential of biofuels like ethanol. Stanford University’s Chris Somerville, director of the Carnegie Institution’s Department of Plant Biology, shares that optimism
Zakaria: Are biofuels going to get us out of the energy trap?
Somerville: It’s not a silver bullet. We need a broad basket of solutions. But it certainly can be important