--30.MICROWAVE OVENS:

The microwave oven is one of the great inventions of the 20th century .microwave ovens cook food in an amazingly short amount of time.A microwave oven uses microwaves to heat food. Microwaves are radio waves. In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). Radio waves in this frequency range have an interesting property: they are absorbed by water, fats and sugars. When they are absorbed they are converted directly into atomic motion -- heat. Microwaves in this frequency range have another interesting property: they are not absorbed by most plastics, glass or ceramics. Metal reflects microwaves, which is why metal pans do not work well in a microwave oven.

HAZARDS:

No doubt that microwave ovens have added many advatages to the daily lives but their frequent used has been negated by the doctors and physicians because of various serious health hazrads.Among the most serious of them is the cause of cancer.Infact some people have termed the microwaves as the "recipie of cancer."

Micro wave cooking is not natural and therefore it cannont be regarded as healthy.The wave radiations that are generated by a microwave oven during the process of cooking or heating any food item are considered extremely harmful and is conceived as one of teh biggest resources of spreading the stomach and intestinials cancers.

The microwave exposure also reduces the nutritive value of the foods .loss of memory,emotional insatbility and a decrease of intelligence.