This week on Green Street, Patti and Doug talk about the health hazards of wildfire smoke and how to stay safe, the effort by the United States to undermine a global plastics treaty ahead of the UN conference in Geneva, and the new report showing that Americans are getting a majority of their calories from ultra-processed foods. Then Dr. Zahra Kassam, radiation oncologist and founder of Plant Based Canada, talks about her work educating the public and her patients about the many health and environmental benefits of a plant based diet.