🌿 AP Environmental Science – UNIT 7 | Topic 7.3: Indoor Air PollutionThis resource package provides a complete teaching and learning set for APES Topic 7.3, covering the sources, health impacts, and mitigation of indoor air pollution. Key Content Covered:Core Concept: How pollutants accumulate in enclosed spaces, often at higher concentrations than outdoors, creating significant health risks.Major Pollutants & Sources: Radon, VOCs, Particulate Matter (PM), Carbon Monoxide (CO), and biological