Air pollution and direct pollutants

From our free online course, “Energy Within Environmental Constraints”: https://www.edx.org/course/energy-within-environmental-constraints?utm_source=social&utm_medium=partner-marketing&utm_content=youtube-harvardx&utm_campaign=harvardx This is the second of a four-part series covering all the major components of air pollution. Here, Harvard Professor David Keith talks about direct pollutants like lead, nitrogen oxides, sulfur oxides, and carbon monoxide. — Subscribe to our channel: https://www.youtube.com/channel/UCKJyv_uNh3LhYFKmwaB63bA?sub_confirmation=1 — Sign up for emails about new courses: https://harvardx.link/email — HarvardX courses on edX: https://www.edx.org/school/harvardx — Harvard University's online courses: https://online-learning.harvard.edu/ HarvardX empowers the faculty of Harvard University to create high-quality online courses in subjects ranging from computer science to history, education, and religion.