Michael Moynihan: Insidious threats to city residents require pre-emptive measures

The health benefits associated with green spaces are numerous — trees reduce pollution, lower stress by acting as a barrier to traffic noise, and cool their areas, while an open area which helps city dwellers access nature also provides a space for exercise and social interaction.
Metaphorical exploration, that is — I don’t like small places that may or may not contain spiders — but with a pothole the threat is visible, at least.