"I love that you've brought this to attention. An extensive database of uncommon but resistant and hardy plants/foods could be developed and organized by climate. Ease of growth and processing should also be taken in to account. I will try to…"
A crash course in changing the world.
Power Shift - From Stove to Solar Cooker
When reading the information for this task, something immediately jumped to mind: a solar cooker I had built just a few months back. I set about repairing and upgrading it so that it fulfill its purpose more effectively! Living in South Africa, makes using solar cookers a viable option as we experience an enormous amount of sun.
Here is my solar cooker, in all it's glory:
I chose a variety of materials which I believed would be effective in harnessing the sun’s heat and stabilizing my solar cooker. The materials were as follows: cardboard - used for framework, stabilization and minor insulation (very effective). Sun reflector - used to harness the sun’s heat. Black insulation foam - used to keep the heat in our solar cooker from escaping (believed to be pretty effective). Tin Can - used to hold the water.
The solar cooker obviously has many environmental benefits. It doesn't release and gases into the atmosphere, it uses only the sun's energy to cook etc. My solar cooker itself was made by recyclable materials. Everything except for the tape holding my cooker together can be recycled. The tape can be burnt or put in a land fill. This is not exactly good for the environment but this is how it has to be dealt with.
Companies like AFRECA (Association for Renewable Energy Cooking Appliances) specialize in making products like solar cookers. The work they do is more than commendable. They make higher quality solar cookers than mine and distribute their products to people who can't afford the luxury of having gas or electric heating.
Just an example of their SunFire product:
Views: 28
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Comment by Gabriel Martin on April 24, 2010 at 10:08pm
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Thanks! I heard there are some Parabolic furnaces, heard anything about that?
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Comment by Martin Dyer on April 26, 2010 at 9:54am
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Yes I have. They use strong mirrors to focus the light from the sun onto a specific point. Apparently they're quite powerful..it's amazing how the sun's energy can be used so efficiently!
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