347,609 views
37 votes
37 votes
How have preservatives changed over the years?

User Iglesk
by
3.1k points

1 Answer

15 votes
15 votes

Answer:

Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals.

User Rashma
by
3.0k points