The 'public space' by which we mean those areas beyond an individual's 'private space,' is an area which clearly influences individual health.  Actions that occur in the 'public space' - impact directly on individual health. 

What do we mean by the 'public space?' - The public space in relation to health, are those activities where individual health and well being intersect with 'political' and 'social' policy.  These are acts taken by the 'State' on behalf of the community as a whole.  Thus, in a 'democratic society' - those actions should reflect the Will/wishes of the community/people.

Unfortunately, this is not currently so - pretty much anywhere on this planet - and it is questionable whether such a democratic system has ever truly existed on this planet.  Indeed, if such a system were to exist on this planet - we could properly speak of the 'arrival of the Kingdom/Queendom of Heaven on Earth.'