A friend of mine once told me of the time she was showing a Parisian client around Edinburgh and how, as a proud Reekie resident, she made a point of taking her visitor to all the best vantage points and sights. At the end of the day, eager for his opinion on the city, she asked him what he thought. To her surprise the man remarked that he had never seen such a tree-less, park-less, stone clad city. As someone who knew Edinburgh’s parks and greenspaces very well I was as taken aback by the story as my friend was…