I am sure; no one will ever think that a super cheap invention would win in a competition. Well, designer John Bohmer has proved it to the world with his $5 Kyoto Box. Despite of its cheap and simple design, the Kyoto Box has the ability to produce cooked food and clean water to billions of people worldwide and most probably the reason why it has won the $75, 000 Financial Times and HP Climate Change Challenge. In order for the Kyoto Box to do its job, it has a black inner cardboard box and a silver foil covered outer box that produces enough heat to cook food and boil water. Through this invention, carbon emitting firewood will hopefully be not in use soon.
Source: Fast Company
