How Energy is Governed. |
Non-Renewable Sources
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Fossil Fuels-
Coal or Natural Gas Mineral fuels - uranium |
Re-Newable Sources
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Solar
Wind Flowing water Biomass Geothermal |
Mollison's Rules For Energy Use• The systems we construct should last as long as possible and take least maintenance.
• These systems, fuelled by the sun should produce not only for their own needs, but the needs of the people creating and controlling them. Thus they are sustainable as they sustain both themselves and those who construct them. • We can use non-renewable energy to construct these systems providing that in their lifetime, they store or conserve more energy than we use to construct or maintain them. |
Holmgren's Sustainability Test• Does the system work to catch and store water and nutrients for as long as possible and as high as possible within its catchment landscape?
• How does it compare with the performance of pristine natural systems as well as wild and naturally regenerated ones (weeds included)? • It is possible for managed productive landscapes to collect and store energy more effectively than pristine systems by the careful use of external, often non-renewable energies. |