By Sarah (Steve) Mosko
Special to the Surf City Voice
Americans today are generally aware that we consume far more energy per capita than most of the world’s peoples, over four times the world average and double that of regions like Japan and Europe which enjoy a similar standard of living. Most of us reflect on home gas and electric bills plus the fuel pumped into our cars’ gas tanks when judging our personal energy footprints.
But in reality it is all the “stuff” Americans accumulate that contributes most heavily to our total energy consumption. To understand why this is true, it is necessary to first get a handle on the ways societies utilize energy.
By convention, the energy-consuming activities of society are divided into the four sectors described below: residential, commercial, industry and transportation. The pie chart insert shows the percentage of total U.S. energy delivered in a year to each sector, according to recent U.S. Energy Information Administration figures. Note that the very same pie chart describes the average per capita energy consumption of Americans in the four sectors.
The residential sector reflects the energy used to run our homes (to power lighting, appliances and heating & cooling systems) and, at 15 percent, it’s the next to smallest pie piece. At 40 percent, the transportation sector is largest but includes all energy inputted to move both people and goods about, be it by car, truck, train, plane, boat or pipeline. Given that about half this amount goes into shuttling people, this means that personal transportation and running our homes together account for only about 35 percent of the energy we Americans use.
An additional 11 percent goes to meeting the energy demands of commercial/institutional buildings which constitute the entire service sector of society – businesses, organizations and institutions including schools, hospitals, correctional facilities, stores, restaurants, theaters, etc. – all of which expend energy for lighting, temperature control systems and appliances like computers and faxes. Though relatively modest, the energy that supports these shared facets of society is overlooked by most of us when contemplating our energy footprint.