Kevin Courtney #NEU💝NHS. (2022, January 5). Ventilation isn’t just for Covid.... ...It’s for Education This study looks at the impact of CO2 not just as a marker of pollution but as a pollutant in itself. It shows that as CO2 rises above 700/800 ppm cognitive function begins to be impaired https://dash.harvard.edu/bitstream/handle/1/27662232/4892924.pdf?sequence=1&fbclid=IwAR2kWIHIJfssa_sw72MD6W1hnkDvSm4bikK5FOLxwQxhjYLEYjfPCfzXz3E [Tweet]. @cyclingkev. https://twitter.com/cyclingkev/status/1478778857536860170

Classroom carbon dioxide levels three times above guidelines. (2021, November 26). https://schoolsweek.co.uk/classroom-carbon-dioxide-levels-three-times-above-watchdog-guidelines/