It is not good to eat uncovered food because many of the harmful microorganisms spoil the food making us fall ill
Food should not be left uncovered in a warm room, as flies and bacterial could not only spoil the food in time, but could cause food poisoning. It is important for health that food is stored and preserved properly to avoid causing sickness, often resulting in diarrhoea and vomiting.
Hygiene and the correct storage and preserving of food in the kitchen is very important.
An uncovered will will eventually become polluted with dead animals and insects that fall into it. It is also dangerous to humans and domestic animals. Cover it.
Yes fungi can be found in canned food that is left open for sometime.
Yes
open
open uncovered building
Open salt is a uncovered kitchenware which contain salt.
It is important to not handle food with an open wound because you could contaminate the food and there are many health risks. If you have an open wound you should wear a glove or not handle the food at all. It all depends on the wound.
honey is only that does not spoil when left open
yes it will rot
Foods stay frozen in the uncovered freezers at the store because cold air drops and stays in the freezer. There is a certain level, though, above which the frozen foods should not be stacked - otherwise they will thaw out.
If there is food in it - yes. If no food, then it doesn't need to be left on - but you might want to prop open the door to allow air circulation to help prevent the growth of mold and mildew.
Insect infestation and decay.