Saving the planet

I was just in Somerfields supermarket, where neatly packaged courgettes from Spain in a little plastic tray were three times the price per kilogram (all but 6 pence) of identical loose courgettes from Spain. I watched a stream of people picking up the packaged ones.

We blame the supermarkets for using too much packaging, importing food by air and so on, but if customers actually prefer to pay almost three times the price to have packaging around their vegetables, what hope for the planet?