Sam is interested in policy interventions to improve human health while stabilizing Earth’s natural systems. With faculty Director roles at the Planetary Health Alliance and the new Johns Hopkins Institute for Planetary Health, he oversees multi-institutional efforts focused on understanding and quantifying the human health of global environmental change and translating that understanding into action globally. He is the co-editor with Howard Frumkin of Planetary Health: Protecting Nature to Protect Ourselves, which was voted one of the 25 Best Books of All Time by American Journal of Health Promotion in 2021. He has authored over 100 peer reviewed articles and book chapters.