WHILE reduction in any form has to be applauded, I have often wondered if plastic bags represent the greatest threat to our planet's future, and indeed that some alternatives mooted have been sufficiently challenged to represent any better environmental care.

I'm just hoping recyclables are to be appropriately separated to avoid cross-contamination, and the compostables provided in a form that can either be processed at home or directed to a facility that can deal with them.

Anyhow, as we are on planet-saving roll may I suggest the next target?

In our fair market towns I cannot help but notice the number of shops and stores with gaping entrances pumping hot air out into the atmosphere.

Without seeking to put too many honest folk out of business or even inconvenience the understandable (indeed essential) consumerist advocacy of some retailers, and the simple preferences of the rest of us who patronise their establishments, might I suggest they be encouraged to keep doors closed when the temperature inside is greater than that outside? I'd go for Shut it and save', which can of course apply to money (in energy cost to both retailer and, if passed on, their customers) as well as the planet.

I'd also hazard this could be quite easily done, might actually help and not require a ton more stuff that may or may not actually work to have a positive impact. Green can be and often is great. But it also still needs thinking about carefully, in the spirit of informed debate.

PETER MARTIN, Kyrle House Studios,Edde Cross Street, Ross-on-Wye.