This is a big question I've always had, just like everyone else. I've learnt a lot over the years from working in several meat factories to topics during a levels and later on.
Adding to that I'm watching the series jimmys food facts on bbc. It really brings home the quality of the food accessible to us today. I feel we have no real idea how good it generally is and how the standard has risen for the masses compared to years ago.
I've just been watching how eggs reach our shelves and didn't realise how much is known about getting quality eggs and picking the best and safest to eat. Also how the waste is used in many other products such as cakes and pastry.