Essay: The Oil We Eat
The journalist's rule says: follow the money. This rule, however, is not really axiomatic but derivative, in that money, as even our vice president will tell you, is really a way of tracking energy. We'll follow the energy.
We learn as children that there is no free lunch, that you don't get something from nothing, that what goes up must come down, and so on. The scientific version of these verities is only slightly more complex. As James Prescott Joule discovered in the nineteenth century, there is only so much energy. You can change it from motion to heat, from heat to light, but there will never be more of it and there will never be less of it. The conservation of energy is not an option, it is a fact. This is the first law of thermodynamics.
Special as we humans are, we get no exemptions from the rules. All animals eat plants or eat animals that eat plants. This is the food chain, and pulling it is the unique ability of plants to turn sunlight into stored energy in the form of carbohydrates, the basic fuel of all animals. Solar-powered photosynthesis is the only way to make this fuel. There is no alternative to plant energy, just as there is no alternative to oxygen. The results of taking away our plant energy may not be as sudden as cutting off oxygen, but they are as sure.
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