The top of the range BME688 sensor on Enviro Indoor can measure temperature/humidity/pressure with a high degree of precision, and the gas scanner will react to changes in volatile organic compounds (VOCs), volatile sulfur compounds (VSCs) and the presence of carbon monoxide and hydrogen to give a general measure of air quality. The BH1745 light sensor can tell you the luminance and color of light, so you could use it to detect unrestful blue light or adjust your lighting's intensity/hue depending on the time of day.