Several recent studies offer strong evidence of positive health effects of green cities for babies, kids, and adults.

Currently, half the world’s population lives in cities, a number expected to top 60 per cent by 2050. Creating cities with healthy green spaces could presumably improve citizens’ health and lower health care costs. One study, Residential Greenness and Birth Outcomes: Evaluating the Influence of Spatially Correlated Built-Environment Factors, looked…