at 378 parts per million, current CO2 levels are…
““at 378 parts per million, current CO2 levels are unprecedented in recent geological history. (The previous high, of 299 parts per million, was reached around 325,000 years ago). It is believed that the last time carbon dioxide levels were comparable to today’s was three and a half million years ago, during what is known as the mid-Pliocene warm period, and it is likely that they have not been much higher since the Eocene, some fifty million years ago. In the Eocene, crocodiles roamed Colorado and sea levels were nearly three hundred feet higher than they are today. A scientist with the National Oceanic and Atmospheric Administration (NOAA) put it to me—only half-jokingly—this way: “It’s true that we’ve had higher CO2 levels before. But, then, of course, we also had dinosaurs.””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
Current CO2 levels are unprecedented in recent geological history, signaling significant climate risk.
In simple terms: CO2 levels are historically high.
Key Takeaway
Act to reduce emissions.
Themes
climate change
history
geology
Mood
urgent
serious
Type
informative
scientific
When to use this quote
- policy making
- education
- activism
- business strategy
Key Concepts
anthropogenic impact
environmental risk
Questions to Reflect On
- How does history inform current climate action?
- What steps can societies take now?
A Different Perspective
Economic and political challenges hinder rapid change.