Jun. 7, 2025
The CO2 concentration at the Mauna Loa observatory in Hawaii has passed 430 parts per million
When man first walked on the moon, the carbon dioxide concentration in Earth's atmosphere was 325 parts per million (ppm).
By 9/11, it was 369 ppm, and when COVID-19 shut down normal life in 2020, it had shot up to 414 parts ppm.
This week, our planet hit the highest levels ever directly recorded: 430 parts per million.