INTEGRATE: Intriguingly, research has demonstrated an inverse correlation between urban street tree density and antidepressant prescription rates in London, UK  (Taylor 2015), even after controlling for measured and unmeasured confounders using Bayesian modelling. Although it remains to be seen whether actually increasing street tree densities will have such effects, researchers reported that for each unit increase in trees per km of street there was a decrease of 1.18 prescriptions per thousand population.