Planted on:Apr 28, 2024 5:04 PMLast tended:May 5, 2024 11:46 PMCategoryPhysical HealthGarden SproutsCO2 is a good tool to gauge risk but it’s not fool proof. It is better to use as a way to ensure ventilation is working, and recognize when you are in a poorly ventilated space. Outdoors isn’t necessarily safe, although it is safer than inside. There are a number of factors that determine if air particles are dispersed. This includes: wind, wind speed, direction of wind, temperature, etc.