Cardboard solar oven wins first prize

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(Photo: Kyoto Energy)

Can a couple of cardboard boxes, black paint, tin foil, and an acrylic cover help solve major environmental and social problems? Forum for the Future certainly thinks it's possible.

The Kyoto Box, a surprisingly simple solar-powered cooker, won a $75,000 first prize in the sustainability group's climate competition.

Jon Bomer, the Kenya-based entrepreneur who invented the cooker, set out to transform the lives of villagers in developing world who use firewood to cook. What's more, the cooker costs about $6.60 to make, so it can actually benefit the people who need it most.

"We're saving lives and saving trees," he says in a press release. "I doubt if there is any other technology that can make so much impact for so little money."

Ironically, the Kyoto box uses the "greenhouse effect" to help the planet. An acrylic cover set atop two cardboard boxes (one inside of the other) traps the sun's energy. Black paint and silver foil help to concentrate the heat. A layer of newspaper or straw placed in between the two boxes provides insulation.

Here are just some of the ways this brilliant invention can make an impact:

  • Decreases carbon emissions created from burning firewood.
  • Slows down deforestation by curbing the need for firewood.
  • Removes indoor smoke pollution and the health problems associated with it.
  • Lowers the cost of energy since fuel from the sun is free.
  • Allows families to easily boil water so they can have access clean drinking water.
  • Eliminates the need for children to spend time looking for firewood so they can spend that time in school.

This just goes to show that sometimes less is more.

See how the Kyoto Box will work in Africa in this video:

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comments from our community

Showing 16 - 30 of 78 comments

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  • Posted by George S Sat Apr 11, 2009 9:52am PDT
    Manufactured by the Solar Oven Society (SOS), a not-for-profit organization, the Sport cooks almost everything. It roasts meats; bakes fish and chicken; steams vegetables; bakes breads, cakes, and cookies. It even cooks rice, beans, lentils and pastas, with only solar energy. Using the natural moisture in meats, fish, and vegetables, the Sport cooks without additional water so all the natural vitamins and minerals are retained, giving food a wonderful rich flavor.
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  • Posted by Wiz Sat Apr 11, 2009 9:58am PDT
    LOL, if you just google solar cooker you can find several designs, most of which cost this much or less and some which are even easier to build which will cook any meal. Sounds like a publicity stunt by enviros to me.
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  • Posted by Konnor K Sat Apr 11, 2009 10:07am PDT
    Wow so many complaints, Get over it. This cheap solar oven is helping people and all your thinking about is "Oh he didn't invent this." SO WHAT! It is helping people.
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  • Posted by marlj Sat Apr 11, 2009 10:12am PDT
    simple things is not just a simple when other people use & benefits from it. keeping old or new ideas just in mind and not showing and sharing it to the needy.. seems different to me.. stretch ur mucles and help others...
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  • Posted by jessica b Sat Apr 11, 2009 10:23am PDT
    My husband is from Africa and $1.50 is the DAILY wage for a laborer. Think of it as the equivilant of $50 US for 8 hours of work in Nairobi, Kenya (a fairly large city). So this thing costs about $7 dollars. The conversion is like this thing costing $235 US. So its not really all that helpful unless a lot of people pitch in on paint.
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  • Posted by boom Sat Apr 11, 2009 10:34am PDT
    Can you use this to dry weed?
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  • Posted by ivy Sat Apr 11, 2009 10:39am PDT
    Politically, I say this was a good invention. But this person did not make it. Long ago, cavemen probably used rocks to cook their food. So, the cavemen deserve the money. But they'd probably eat it. And it's not exactly a green ivention either.
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  • Posted by D L Sat Apr 11, 2009 10:56am PDT
    You mave have done the projects when you were younger but you didn't think to introduce the idea to the 3rd world countries guys. Remember this affects those kids lives. Do you think you could live a life like theirs?
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  • Posted by Margo C Sat Apr 11, 2009 10:59am PDT
    You are all rotten. I think this cooker is wonderful. I might make one to use outside this summer. It beats the heck out of cooking inside and heating the house up!
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  • Posted by AB Sat Apr 11, 2009 11:23am PDT
    Hey.. it's preventing rape and killings for the ladies~ Yeay~ That I must say.. I am glad to see help for them and us. I just hope there are enough supplies of the Kyoto box for all of them. Maybe soon..crosses fingers.. They will get more help with more "Green Living" such as planting new trees to replace the ones cut for card board. Maybe find another substitute for the black paint that may be putting out VOC's? Changing and helping each other to make a place cleaner and greener.. has to start some where. That includes ME. Maybe the person who won the money ...may also give the money towards the Kyoto box or even towards green living over there~ Congratulate for all who thought or experienced the idea. It is the first I heard of it. Glad it finally got published and became an interest in all forms of reactions. This may cause others to figure out more sweepstakes or winning games to invent or things that have been set aside for unknown reasons and brought back to make it noticed again such as the cooking box.~ I kind of wonder.. are they recycling the painted card boards to use again?
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  • Posted by mommy Sat Apr 11, 2009 11:40am PDT
    well i really love the fact that he tried to help other people and im sure he was not in it for the money. all ya haters haters need to keep ya negative comments to yourself nobody cares what you think if you aint helping then don't talk.......... and its that simple have a great day
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  • Posted by Trissy Sat Apr 11, 2009 12:03pm PDT
    The reason he got so much money, was because hes the one who put it to GOOD use not to get an A on a science project. Hes using it to help people, you did it to help yourselves, do you see where I'm going with this??
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  • Posted by Kit N Sat Apr 11, 2009 12:04pm PDT
    look the whole thing would burn if if you tried but I have never heard of one catching on fire.My grandson built one for a science fair and his teacher burned herself trying to prove it would not work. I have been involved in many discussions about this coulc be used to help the poor and even the homeless but did not pursue avenues to make it happen.Cudos to someone that is putting that in motion!!!!!
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  • Posted by ChristineM Sat Apr 11, 2009 12:13pm PDT
    why is everyone hating on this? Its wonderful that people who dont have lots of money will be able to now boil water or cook things. The cooking may take a much longer time than a regular oven, but at least it can get done. We really dont need all the negativity in the world, so grow up people! I saw congrats to the inventor!♥
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  • Posted by Toto Sat Apr 11, 2009 12:13pm PDT
    i don't think you need to have box for it. How about just a foil around a pit with stones. I agree with many on this subject... It is not an invention...
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