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2. 2018. How air pollution is destroying our health. https://www.who.int/news-room/spotlight/how-air-pollution-is-destroying-our-health 2018. How air pollution is destroying our health. https://www.who.int/news-room/spotlight/how-air-pollution-is-destroying-our-health
3. 2021. Aeroqual: Air Quality Monitoring Equipment. https://www.aeroqual.com/ 2021. Aeroqual: Air Quality Monitoring Equipment. https://www.aeroqual.com/
4. 2021. AirBeam: Share & Improve Your Air. nttps://www.kickstarter.com/projects/741031201/airbeam-share-and-improve-your-air 2021. AirBeam: Share & Improve Your Air. nttps://www.kickstarter.com/projects/741031201/airbeam-share-and-improve-your-air
5. 2021. Measure PM and CO2 Temp Humidity with Airveda Monitors: Breathe Well. http://www.airveda.com/ 2021. Measure PM and CO2 Temp Humidity with Airveda Monitors: Breathe Well. http://www.airveda.com/