A fully resourced set of teaching materials for ESS Human populations and urban systems Unit 8.3 – Urban air pollution. A subtopic for the new IB Diploma Environmental Systems and Societies course, first assessment 2026, which is first taught in 2024. Created by an IB curriculum developer, examiner & workshop facilitator, this Standard Level sub-topic is part of the Human populations & urban systems topic that is the eighth unit of the ESS course. This unit contains three lessons with PowerP