Empiricism, hitherto the only guide, if indeed a guide at all, was replaced by exact scientific knowledge; the connexion of each phenomenon with a controllable cause was established, and rule-of-thumb and quackery banished for ever by the free gift to the world of the results of his researches.
While this type of behavior is controllable when the owner is home, what happens when they are allowed to run loose when the owner is away?
Do you have a lot of light, mid-level amount of light, low light or a controllable combination of all three?
As you can see, there are many ways that carbon can move around the system, and not all of them are harmful or controllable.
Since production of biofuel material is also controllable, you wouldn't find the same fluctuations in price as you do with oil and gasoline.