joanna blythmanlast updated at 1122am, march 2 2015every scrap of processed food we eat has to be packed. packaging protects food on its journey from the processing plant to shops and supermarkets, and to our homes. you may think you don&rsquot eat processed foods, but in reality you probably eat them every day.whether it&rsquos your lunchtime supermarket sushi, sandwich or salad, that fruit smoothie or slice of coffeeshop sponge cake, perhaps the salami you serve as hors d&rsquooeuvres, or the carton of soup you warm up for a quick supper ... these are all processed foods that, while regarded as relatively &ldquohealthy&rdquo, cohabit intimately with packaging chemicals 
