How I built an air quality sensing system using Raspberry Pi | by Mateusz Janusz | Medium
STM32 based Indoor Air Quality Sensor Connects to Raspberry Pi or Arduino (Crowdfunding) - CNX Software
Amazon.com: Digital SGP40 VOC (Volatile Organic Compounds) Gas Sensor for Easy Integration Into Air Treatment Devices and Air Quality Monitors, I2C Bus Support Raspberry Pi/STM32 : Electronics
Indoor Air Quality Monitoring System - Electronics-Lab.com
Raspberry Pi HAT measures indoor air quality ...
Monitor air quality with a Raspberry Pi - Raspberry Pi