Modified atmosphere packaging is a process that has been around for decades now, and as long as it has been used, many perishable products have survived previous conditions and lengths of stay on shelves waiting for customers to buy and consume them. The technology is nothing short of genius, the discovery of which we can all say revolutionized the food industry, as well as other sensitive product industries.
The oxygen we breathe, while it is essential for our lives and that of plants and organisms everywhere, can too be detrimental in the case of packaged fruit, fish and other foods. Because small bacterial activity and metabolic processes continue taking place after picking fruit or cutting meat into their sealed packaging, they eventually go off and unusable in predictable times. This can be changed by carefully modifying the atmospheric composition inside the packaging of whichever food we wish to prolong their lives.