This is something I am beginning to learn more about.

Making it relevant to Transition, think about it this way: it is estimated that 40 percent of global energy consumption goes into running pumps, fans, and motors. Every one of them has a fan blade or rotor.

What if we could increase the efficiency of those fans and rotors, by redesigning them to match the shape of a Nautilus shell?

This article says that would increase energy efficiency by 40%. Which (if I understand the numbers correctly) means a 16% reduction in total world energy usage — certainly a step in the right direction.

More nice examples, including building design and Velcro, here:

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