1 Jul 2010 02:15
[BillTottenWeblog] Energy Use in the US & Global Agri-Food Systems
Bill Totten <shimogamo <at> ashisuto.co.jp>
2010-07-01 00:15:21 GMT
2010-07-01 00:15:21 GMT
Implications for Sustainable Agriculture by Shirin Wertime culturechange.org (June 05 2010) During the 20th century, access to cheap and abundant sources of energy helped transform the world in countless ways. Extraction of fossil fuels led to a massive expansion in economic growth and agricultural production, and was one of the bases of a six-fold increase in human population. Petroleum, the most sought after fossil fuel, had the largest role in this transformation. Because of its versatility and liquid form, oil is today the world's primary transportation fuel (Heinberg 1) and leading source of energy (Brown 27). Less than 200 years ago, however, all of the planet's food energy was derived from the sun through photosynthesis (Pimentel, Pimentel & Karpenstein-Machan 3) and almost all work was done by human or animal muscle power (Heinberg 2). Practically all of our energy presently comes from non-renewable resources whose stocks are being depleted at an ever-faster rate. The benefits we derive from oil are so numerous and of such great convenience that we have built our entire way of life around its use. Now we are entering a period of declining oil supplies and rising prices that threaten not only food security for increasing numbers of people globally, but also many aspects of political and economic stability as well - a new phenomenon for a world that became accustomed to growing supplies of oil and relatively stable prices. Unless we begin quickly to a move away from fossil fuel(Continue reading)
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