A Norwegian inventor has won the Financial Times Climate Change Challenge with a simple cardboard box transformed into a solar oven powerful enough to cook food, bake bread and boil water. The “Kyoto Box” consists of two cardboard boxes -- one box painted black inside another box covered in silver foil -- topped with an acrylic cover to trap the sun’s rays inside the box. “This took me about a weekend, and it worked on the first try,” said JohnBohmer. “It’s mind-boggling how simple it is.” The solar oven could alleviate the need for firewood for up to three million people around the world and save millions of children from deaths caused by unboiled water. (CNN)

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