Add Yahoo as a preferred source to see more of our stories on Google. Kieran Mitchell, CEO of Caribou Biofuels in Salida, Calif., talked about using walnut shells in activated-charcoal filters on Dec.

Thanks to the fact that this kitchen scrap breaks down slowly, it's perfect for giving your soil a manageable dose of helpful ...

DIXON (CBS13) - A trailblazing local farmer is producing power using leftovers from his harvest. He was recently honored as an environmental hero by the government. Russ Lester's on the cutting edge ...

The push for renewable energy has led scientists to explore sources once thought of as useless. From food waste to plant fibers, researchers are looking at nature’s discarded materials in search of ...