This week, hosts Mark Masselli and Margaret Flinter speak with Dr. Maria Neira, Director of the Department of Public Health, Environmental and Social Determinants of Health at the World Health Organization, on their recent report on pollution's impact on global health leading to more deaths than HIV, Malaria and TB combined. She discusses the Paris Climate Accord as an important step in addressing the effects of climate change on human health, the ongoing battle to contain HIV/AIDS and how the WHO is better prepared for pandemics like Ebola.