the VOA Special English Development Report.
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.
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.
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.
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
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.
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.
learn more about solar cooking at solarcooking.org. Or write to Solar Cookers
International. The postal address is nineteen nineteen Twenty-first Street,
Sacramento, California, nine-five-eight-one-one, USA.
that's the VOA Special English Development Report, written by Jill Moss.
Transcripts and audio archives of our reports are at voaspecialenglish.com.