[quote=Is it biodegradable, incidentally?
[/QUOTE]
Certainly not the bulk of gum on the market which is based on a petrochemical derivative - effectively it is a form of plastic. Eventually the chemical 'strings' that cause the gum to stay as a single mass, break down and the whole thing ends up as a powder - takes about two years I think. I suspect that environmentally the municipal approach to a cure - endless chemical or mechanical cleaning - is worse than the disease but perhaps it's time to put a tax on gum on the 'polluter pays' principle.
CM