This week, hosts Mark Masselli and Margaret Flinter revisit their conversation with Dr. Maria Neira, Director of Public Health and the Environment at the World Health Organization who addresses the rising threat to human health from climate change and pollution - now the 4th leading cause of death worldwide. She discusses global strategies that are required to reduce the harm being done to populations around the world, especially those most vulnerable, in the wake of advancing climate change and unmitigated pollution.