Introduction:

Food preservation is maintaining food from spoiling after harvest or slaughter. There are several different methods to preserve food, but some of the ways we preserve food everyday is using the refrigerator. Food preservation has been practiced since the prehistoric times. But through time, the skills and techniques of preservation has developed and in the modern world, you will be able to see both negative and positive effects of the development of food preservation. A negative result of the food preservation nowadays is using preservatives which contains bad chemicals for our body. Some examples of the methods of preservation in the past are drying, refrigeration (without the use of refrigerators, but usually used store them underground), and fermentation. These old methods have evolved and influenced the methods we use today, we still use some old methods though. These modern methods include canning, pasteurization, freezing, irradiation, and use of chemicals. Packaging has played a big role in preservation in the modern world. If food preservation wasn't as developed, we wouldn't be able to pack lunch like we do, buy food as convenient as these days, and also we might not have been able to eat fresh food. Food preservation has made it possible for people in different areas try new and different food and also let them have access to healthy food which are required for intake in a healthy person's body. People these days use the refrigerator to store food without it spoiling. The refrigerator is able to do this because it stores the food in a low temperature. When the food stays in a cold environment, there is less chance of bacteria forming in the area. Which means that placing the food inside the freezer will keep the food fresher and will stay fresh longer than if the food is kept in the refrigerator