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Free Energy Files: ‘Zero Electricity’ Air Conditioning

21st Century Wire says…

Every day, new solutions to basic, everyday problems are being solve using zero-energy solutions.

This latest mini-project uses recycled plastic Coke bottles to compress air and create a reverse air flow that can cool interiors on extremely hot climates…

Eco-Cooler: Most homes in Rural Bangladesh are made out of tin huts that go over 45° celsius during the summer. Our employees volunteered and teamed up with Grey Dhaka to address this issue.

(Hat tip/



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