On Fox2 this morning the news people were reporting on a CNN report on a new study which found that people who live alongside busy highways are more prone to developing dementia. "Researchers found that people living within 50 meters (164 feet) of such a road had a 7% greater risk of developing dementia while People living more than 200 meters from a major road weren't seen to have any increase in risk."
The reasons for this are couched with the word "could" because the cause is probably not known and not studied. "Previous research has suggested that exposure to air pollution and traffic noise could increase nerve degeneration within the brain. One study found that certain particles common to air pollution could enter the brains of people who breathe them in."
This will certainly not help home sales in these areas.