Gillian King 🐘 STAY SAFE: 😷 1.5m Ventilate 💉x4 on Twitter

“Yet CO2 levels continued their upward trend as the train journey progressed: 2167ppm at Tahmoor, 2210ppm at Picton, 2257 at Menangle. Each worse for brain function, health. #IShareYourAir #COVIDisAirborne #CovidIsNotOver #AirQuality 10/”