Chemberry, the Swiss-based search engine for chemical ingredients in personal and home care products, recently studied the effects of environmental and lifestyle factors on skin health in 80 cities worldwide, including five in the United States. As a result, they name Phoenix, Arizona, as the world’s best city for the skin.

The results of the study raise awareness on which factors city dwellers should be most aware of according to where they live, if they wish to protect their skin from the urban strain, and reveal which cities are the best and worst for skin health. The study looked at nine factors that impact skin health, including average yearly temperature, number of days of sunlight, average UV radiation index, air pollution, average wind speed, average humidity over a year, the average working hours per person, traffic congestion and average daily cigarette consumption per smoker.

See the results of the study.

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Originally posted on Salon Today