• Take a mobile CO2 meter with you in various locations
• Post your measurements on Twitter
• Add the hashtag #covidco2
In a cinema with room for 94, but only 5 spectators. It was ventilated with 100% fresh outside air. CO2 concentration never exceeded 600 ppm. (...which I noticed afterwards on the graph because the film was way too beautiful to keep an eye on that meter)
New guidelines for schools in Belgium include:
• Classroom doors and windows must be wide open.
• Equip classrooms with CO2 meters. Schools will receive support and information regarding the purchase of a CO2 meter.
brusselstimes.com/belgium/128745…