Tesco have introduced what they call 'naked deliveries', an attempt to reduce the 4 billion bags their grocery delivery service uses every year. I'm trying to imagine what 4 billion bags looks like and how much oil and energy is used to produce them. It's quite hard. But it is a fitting response to consumers concerns which at the moment are focussed on packaging and recycling. Tesco's website today 13.06.07 has information right in the middle of their home page about the scheme.