When did food preservation start which year is it?

It's difficult to pinpoint an exact year for the beginning of food preservation. It's likely that humans began preserving food almost as soon as they started cultivating crops and domesticating animals, which dates back thousands of years.

Here's a rough timeline:

* Prehistoric times: Humans naturally started preserving food through methods like drying, salting, and smoking. This is likely as old as agriculture itself, around 10,000 years ago.

* Ancient civilizations: Egyptians developed techniques like pickling, fermentation, and using honey as a preservative around 3000 BC.

* Middle Ages: Techniques like canning, using saltpeter, and preserving with vinegar became more common in Europe.

* 18th and 19th centuries: Scientific advancements like pasteurization (1864) and canning (1795) significantly changed food preservation.

So, while an exact year is impossible to pinpoint, food preservation has been an essential practice for humans for thousands of years.