How Far Can Public Health Spending Go?

Calderdale is reportedly putting aside some of its Public Health Budget for road safety.  Intellectually, thais makes a lot of sense.  20mph zones have a well documented and beneficial effect on public health.  Spending their public health funds in that way may well save more lives than whatever else they were planning to do with it, but I suspect it will still be seen as too radical a step for many people, who would prefer the money to be spent more traditionally _ on anti-smoking campaigns for example.

However, my view is that local authorities taking on the public health responsibilities gives an opportunity for a much more imaginative use of such funds for issues that traditionally don't get the attention they deserve; for example, air quality.