Category: 15min-30min

The Most Ethical Renewable Energy Systems

The main thing in renewable energy systems is the embodied energy: the energy over the lifetime of the product versus the energy of manufacturing it. Lithium batteries are used a lot because they are lightweight, but they don’t last. Lead-acid batteries, like car batteries, are also short-lived. An old technology, the nickel-iron battery, lasts a long time. Lithium batteries are great when there might be a space or weight issue, […]

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Permaculture: A Quiet Revolution

Permaculture: A Quiet Revolution

Film from 8th International Permaculture Convergence (IPC8) (1) which was held in four permaculture communities across Brazil in 2008. Featuring Rosemary Morrow, the film focuses on how the participants were “preparing for, and mitigating, our looming global crisis”. Still very much relevant now as it gives a useful introduction to each of the four sites used to host the IPC8 and some of their features, as well as a short […]

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