21 January

This is a beautiful gadget. Measures CO2, as well as temperature and air pressure. An excellent way to tell if the building you work (or live) in is adequately ventilated. Anything above 1000 = not enough fresh air. People might remember my passion for air quality, the more people focus on it, the more chance something might get done. The only thing distinguishing life from the barren void of most of the universe is air. We’re criminally complacent about it.