This channel (https://thingspeak.com/channels/322661) reports the CO2 or pollutant level returned by an MQ-135 sensor. You can compare this with the average atmospheric CO2 level available at https://www.co2.earth.
The air quality sensor monitor the concentration of PM2.5 in indoor locations. It is developed and made in Hong Kong.
Contributor: Leo Siu, Leo Chan, Eddie Yung
Citizen Science Project coordinator: Maria Li
Live display of Fort Collins Ozone levels, Temperature, Humidity, Wind speed, and UV Index.
Data obtained from the Colorado Department of Public Health & Environment and AccuWeather
3416 W. LaPorte Ave.