By Alyssa Casey
Agricultural production consumes large amounts of energy both through direct energy usage, such as fuel and electricity, and through the energy-intensive production of fertilizer. This makes the U.S. agriculture industry sensitive to changes in energy prices. Because current agricultural techniques are energy intensive, food production is also a significant source of climate-altering emissions. Greenhouse gas emissions from agriculture have increased rapidly in recent years.
With this undeniable link between agriculture and energy, the future of energy will greatly influence the future of agriculture. Concerns surrounding fossil fuel supplies and climate change are stimulating attempts to convert more of the world to cleaner, more sustainable energy sources. It is likely that the agriculture industry will find itself adapting alongside energy.
What are these possible advances in the future of energy? How do we attempt to understand the changes and participate in the discussion, which can be muddled by a multitude of energy sources, mathematical equations, and units of measurement?
These questions were the basis for a new book, A Cubic Mile of Oil: Realities and Options for Averting the Looming Global Energy Crisis, by co-authors Hewitt Crane, Edwin Kinderman, and Ripudaman Malhotra of SRI International. The study attempts to clear the hurdle of constantly converting between energy units, such as gallons, barrels, British Thermal Units, and kilowatt-hours, and to address the question of how to continue supplying energy to a growing world population.
The book builds off the premise that talking about current and future energy consumption can be simplified through the use of one all-encompassing unit of measurement, the “cubic mile of oil” (CMO). One CMO can be understood by simply envisioning a swimming pool one mile wide, one mile across, and one mile deep. This unit does away with the need to constantly convert between units and eliminates the need to tack on an unfathomable multiplier, such as one billion barrels.
After establishing the premise for using the CMO, the authors divide the book into three sections. The first explains the history of energy consumption and the sources from which humans have obtained energy. The second separates energy sources into two simple categories: inherited energy sources, such as oil, coal and natural gas, which exist in limited and diminishing supplies; and income energy sources such as wind, biomass, hydropower, and solar power, of which a relatively infinite supply exists. The final section discusses the future of energy supply and consumption, emphasizing the need to conserve our current supply and invest in a sustainable plan for powering our future.