Philadelphia July 25, 2017 11:57 am Nature PHL Dr. Barbara Rolnick and Aaliyah Green Ross are in studio to talk about the program Nature PHL that is geared toward getting kids to spend more time outside, increase their physical fitness and get exposed to nature. US & World Videos 3:04 PurpleStride event in Philly raises money for those battling pancreatic cancer 3:27 ‘Take a Breather' and run to help battle against cystic fibrosis 1:49 How much time do you spend on your phone each week? Keith Jones, Erin Coleman talk screen time 2:52 Join the fight for ovarian cancer treatment and research at the Sandy Sprint 3:13 Movement, memory and Parkinson's awareness