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Via SkyNews:

This is the £50,000 winner of a contest to find the world’s greenest invention – a solar-powered oven made from cardboard.

The cooker took the FT Climate Change Challenge crown after beating 300 other creations, including a food additive which stops cows passing wind.

The Kyoto Box oven – which costs just £3.50 to make – can cook casseroles, boil water and bake bread.

It is made from two boxes, one inside the other with an acrylic cover, which lets the sun’s power in and traps it.

Black paint on the inner box and silver foil on the outer help concentrate the heat while a layer of straw or newspaper between the two provides insulation.


Cardboard Oven Wins £50,000 Green Contest

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor for Boing Boing and WINK Books. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.


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