‘Tis the season for giving up things that are bad for us, and the author of a new book, The Case Against Sugar, says sugar should be at the top of the list. Gary Taubes joins Libby to make his case against sugar. And… A new study published in The Lancet from Public Health Ontario and the Institute for Clinical Evaluative Sciences shows that where you live can affect your risk of dementia if you live close to high traffic areas. One of the lead authors, Dr. Ray Copes, joins Libby to explain.