In this episode of Frontiers in Health and Happiness, Dr. Lindsey Burghardt, pediatrician and Chief Science Officer at the Center on the Developing Child at Harvard University, explores how environmental factors like extreme heat, air pollution, and climate change uniquely impact young children's physical, mental, and social development. With real-world examples and compelling research, she discusses how science can inform policy and drive meaningful change—from designing child-friendly cooling centers to supporting caregivers and communities in building resilience. Dr. Burghardt also shares practical tips for families and a heartfelt message about the power of unconditional love in early childhood. Whether you're a parent, policymaker, or early childhood professional, this episode offers eye-opening insights and actionable ideas for creating healthier environments where all children can thrive.