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Japanese
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Solar Cookers in Developing Countries
March 28, 2005 |
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03:57 [DR032805]
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I’m Gwen Outen with the VOA Special English Development Report. |
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Millions of people around the world cook their food over a smoky fire
every day. It is often difficult to find wood for the fire. People who do
not have wood must spend large amounts of money on cooking fuel. However,
there is a much easier way to cook food using energy from the sun.
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Solar cookers, or ovens, have been used for centuries. A Swiss scientist
made the first solar oven in seventeen sixty-seven. Today, people are
using solar cookers in many countries around the world. People use solar
ovens to cook food and to heat drinking water to kill bacteria and other
harmful organisms.
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There are three kinds of solar ovens. The first is a box cooker. It is
designed with a special wall that shines or reflects sunlight into the
box. Heat gets trapped under a piece of glass or plastic covering the top
of the cooker. A box oven is effective for slow cooking of large amounts
of food.
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The second kind of solar oven is a panel cooker. It includes several flat
walls, or panels, that directly reflect the sun’s light onto the food. The
food is inside a separate container of plastic or glass that traps heat
energy. People can build panel cookers quickly and with very few supplies.
They do not cost much. In Kenya, for example, panel cookers are being
manufactured for just two dollars.
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The third kind of solar oven is a parabolic cooker. It has rounded walls
that aim sunlight directly into the bottom of the oven. Food cooks quickly
in parabolic ovens. However, these cookers are hard to make. They must be
re-aimed often to follow the sun. Parabolic cookers can also cause burns
and eye injuries if they are not used correctly.
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You can make solar ovens from boxes or heavy paper. They will not catch
fire. Paper burns at two hundred thirty-two degrees Celsius. A solar
cooker never gets that hot. Solar ovens cook food at low temperatures over
long periods of time. This permits people to leave food to cook while they
do other things.
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To learn more about solar cooking, you can write to Solar Cookers
International. The address is nineteen nineteen Twenty-First Street,
Sacramento, California, nine-five-eight-one-four, USA. Or you can visit
the group’s Internet Web site. The address is www.solarcooking.org.
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This VOA Special English Development Report was
written by Jill Moss. I’m Gwen Outen. |
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Voice of America
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