From putrid water to fizzy cola, food processing gave us preservation, consistency and innovation. So how did it become associated with unhealthy food? | Gadgeteer

Much of food processing is about making foods safer and longer-lasting, which is better for the environment as it means less food waste. But clearly some processed foods are very bad for your health. Where did this happen?
The 4th Earl of Sandwich is perhaps best-known for lending his name to two slices of bread with a filling in between. However, he has another claim to a lunchtime staple – soft drinks (this I did not know).