The Which? report on the carrier bags retailers use for home deliveries misses the point on two counts.

Overall, retailers and customers halved numbers of single-use carrier bags between 2006 and 2009, a downward trend that continues. That's six billion fewer a year, a reduction achieved voluntarily with campaigns and rewards tailored by retailers to suit their customers.

But in truth, carrier bags are not the main environmental issue. Retailers are pushing hard on things that can actually make a difference. They're helping customers reduce waste through measures such as providing consistent on-pack recycling information, improved recycling facilities and halting the growth of packaging, despite rapid rises in population and sales.

Bob Gordon, head of environment, BRC