A St. Louis University School of Medicine study looked at an unusual driving risk – sun damage! Window glass (like a super high SPF sunblocker) protects us by blocking out UVB, the most dangerous of the sun’s rays. However, UVA radiation can still penetrate through the glass. UVA goes deeply into the skin and is of growing concern as a cause of skin cancer. UVA also compounds the damage and premature aging already caused by UVB and the sun. Of important note: the study found that facial skin cancers in the U.S. are more prevalent on the left side of the face – that side nearest the driver’s window.