This was an «ecological study» that looked at how 42 countries in Europe eat (i.e. overall consumption of common foods as a population) compared to that country's incidence of CVD (including high blood pressure and high blood glucose).
This is in part supporting UH and the local government's own agreement that the University will be «net zero» energy i.e. producing more renewable energy than overallconsumption requires, by 2035.