This video shows algae, which eats carbon dioxide and excretes oil, in action. Over time, the biomass falls away to the bottom and leaves the oil at the top.

This technology is part of a new movement towards green oil, including products like ethanol, biofuels and oils like this one from algae. While the number of companies working on extracting the oil has multiplied, few companies specialize in harvesting the algae itself. Keep reading →