chemical
uncovered things are expose to flies . this type of food carries bacteria and germs of various diseases .
with UV light bulbs
Microwave ovens don't expose food to electric currents, they expose food to microwaves. Microwaves are a type of electromagnetic radiation, or a type of light. The only difference between visible light and microwaves is the wavelength of the light. Wavelength is what makes blue light look different from red light (red light is made of physically longer waves). Microwaves are much shorter than visible light and have much higher energy. That energy is used to heat up the water molecules in the food you put in the microwave. That's how it heats up your food.
As you know light bulbs give off a good amount of heat, so to keep food under a light will keep the food somewhat warmer. That is why resturants keep plates of food in the "hot line," just a fancy way to say a counter with a lamp over it.
Perishable.
no
Flies and bees will both sit on uncovered food. Food should always be covered especially when outside in the elements.
Because this will cause the food to spoil and make you waste your money for no reason. ================================ Another concern about unnecessary handling of food is that it will expose the food to more possibilities of contamination or adulterantion - some of which could cause foodborne illnesses.
when food is uncovered for a long time micro organisms adapt the food which causes damage to our health. in covered food micro organisms cannot occupy it
It rots.
it is not healthy