Ecology

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  • FUTURE SCENARIOS by Holmgren, David
  • The changes are coming sooner than expected - Holmgren points to a comprehensive study showing that the amounts of energy needed to extract and refine energy are increasing so fast that by as soon as 2014 the net energy yield from gas in Canada (to name just one major producer) will fall to almost nothing.
  • Holmgren points out that the US Department of Agriculture considers an energy return on energy invested (EROEI) of 1.6 for corn ethanol a "good result".
  • But a society based on an energy source of this quality would be constantly investing 62 per cent of its energy back into the energy industry, leaving just 38 per cent for everything else - health, educaction, culture, food production, leisure and so on. We've been used to fuelds with EROEI rates as high as 100.

Healing Mother Earth: E.O. Wilson

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