https://blogs.mercola.com:443/sites/vitalvotes/archive/2017/01/05/dementia-rates-higher-near-busy-roads.aspxA new study of several million Canadians shows that dementia rates are 7 percent higher among those living within 50 meters (164 feet) of a high-traffic road, as compared to 4 percent higher if they live 50 to 100 meters away from the traffic, NewsweekenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)