The Kyoto Box is a solar cooker constructed from polypropylene with acrylic glass cover. The oven would be the suns rays, creating enough heat to cook or boil water. It was invented by Jon Bohmer, a Norwegian born inventor based in Kenya . It was marketed as part of the Kyoto Energy product range.
Construction and use
Two cardboard boxes, a newer, commercial version was constructed from polypropylene , making it more robust and durable. Temperatures inside the box quickly reached 80 degrees Celsius (176 degrees Fahrenheit)  on a sunny day. According to the Kyoto Energy website , temperatures could reach a maximum of 165 degrees Celsius.  Bohmer claimed that the oven was capable of boiling 10 liters of water in two to three hours. 
Solar cookers are being used by the world. Solar cookers can also pasteurize or sterilize water to provide safe drinking water without using or collecting firewood.
After the award of the Financial Times Climate Change Challenge 2009 the design of the Kyoto Box was modified from the original cardboard to polypropylene, boosting the cooking performance. A further innovation was the use of a white reflector instead of one covered with foil or gold Mylar. 
The Norwegian Inventor, Jon Bohmer, made the first model of the Kyoto Box with his daughters then aged 10 and 5 years old. It was first just a project with his children, but later won the FT Climate Change Challenge award.  He won the first prize, since the invention reduced carbon emissions by eliminating the need to burn wood . 
- Solar cooker
- Jump up^ “Kyoto Box, Solar Cardboard Wins Cooker Climate Prize” . GreenPacks. 2009-04-09 . Retrieved 2012-02-14 .
- Jump up^ “Kyoto Box” . Kyoto-energy.com . Retrieved 2012-02-14 .
- Jump up^ “Invention – The Oven Solar Box Oven – The Blogs at HowStuffWorks” . Blogs.howstuffworks.com. 2009-04-10 . Retrieved 2012-02-14 .
- Jump up^ “KYoto: Award-winning” Kyoto Box “launches ahead of Copenhagen summit” (PDF) . Kyoto-energy.com . Retrieved 2013-11-02 .
- Jump up^ Climate Change Challenge. Collected 4 Apr 2009.
- Jump up^ Prize for ‘Sun in the box’ cookerBBC News. Collected 9 Apr 2009.