 CBD, a natural chemical derived from cannabis, is already being used by people to treat things such as arthritis. WTOP's Mike Murillo finds out it could also be an answer to preventing skin damage after sun exposure. When you get sunburned, it damages your skin, and worse, it could lead to skin cancer. But Dr. Adam Friedman, chair of dermatology at George Washington School of Medicine and Health Sciences, says with a new study they participated in,