This page is an extract from 'Permaculture: A Beginners Guide' by Graham Burnett Permaculture, a Beginners Guide "Permaculture offers a radical approach to…

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Slide 1 Renewable Energy Sources composed by Dragica Vasileska Slide 2 In the last 100 years, the Earth warmed up by ~1° C 100 years is nothing by geological time scales!…