Can Biofuels (bioethanol, biodiesel) Scale?

Biofuels like bioethanol and biodiesel, and biomass like wood pellets, have been supported by governments around the world as a form of 'renewable' energy and as a way to achieve 'energy independence' by substituting bio energy for coal or oil. But is bio energy clean? And can it scale? Is it financially viable? Watch "Solar Trillions" author Tony Seba talk about biofuels and biodiesel, starting with the fact that green plants are solar plants.
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