CO2 levels just broke another record. Here's what that means

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.

"This problem is not going away, and we're moving further and further into uncharted territory, and almost certainly, very dangerous territory."