Nowadays we can develop a device which will measure all parameters of air - temperature, humidity and also we can buy CO2 sensor and measure the quality of air.
The value of CO2 sensor is really important for us, because the increased concentration of CO2 can cause fatigue, drowsiness and higher concentration can endanger your health.
I used CozIR-LP sensor and the data is sending to tmep.eu where is the vizualition of data. The article is available on https://time4ee.com/articles.php?article_id=127