I don't want to shop daily, so I need produce that can last for at least a week. Otherwise I will cut them out of my diet, which will be slightly less healthy.

We have had a penchant for food that doesn't go bad for very long periods of time for ages (why do you think meat was salted?). Achieving it, especially without ruining the food, is a very recent accomplishment, which naturally the environmental people are looking to take away.