Claudia Romeo: We're in Saint-Malo, Brittany, France, and we're about to visit Bordier, a traditional maison du beurre, or butter house. When you picture butter, you probably think of a yellow ...

California-based startup Savor makes fats and oils without any agriculture, and just commercially launched its butter made from methane or CO2.

The large, square layer of buttery fat is actually a first of its kind. It's not animal based or plant based, but created ...

But the butter he's mixing into the recipe today, is different ... of fats. Those are made up of atoms, things like carbon, hydrogen and oxygen. What if you could go find sources of carbon ...