Earth's atmosphere hasn't had this much CO2 in millions of years

nbcnews.com ^ | June 5, 2025 | By Denise Chow and Chase Cain

[PROCON]

NBC 'News' getting clobbered in the comments over on X too!

[DariusBane]

We are already dead!

[algore]

yes, OSHA actually did tests back when we maybe had real science. the 470 ppm concern me far less than the autopen

“Basis for original (SCP) IDLH: The chosen IDLH is based on the statements by ACGIH [1971] that a 30-minute exposure at 50,000 ppm produces signs of intoxication, and a few minutes of exposure at 70,000 ppm and 100,000 ppm produces unconsciousness [Flury and Zernik 1931]. AIHA [1971] reported that 100,000 ppm is the atmospheric concentration immediately dangerous to life. In addition, Hunter [1975] noted that exposure to 100,000 ppm for only a few minutes can cause loss of consciousness.”

[Seruzawa]

So this means that the CO2 has been this high before.

[plain talk]

So they are admitting that this planet HAS had these levels of CO2 in its recent history (M of years is recent history for a 4.5B year old planet)...

[FlipWilson]

I knew NBC had been spewing chit for what seems like an eternity, but turns out they were around millions of years ago to measure CO2. Or their “experts” were.

[Jim W N]

So says Lying ABC News, the worst source for the truth about rumors.

[Openurmind]

This is an absolute outright lie period.

CO2 was much higher almost exactly 125.000 years ago before the last ice age.

[SkyDancer]

Logging off all those trees that convert CO2 into O2.

[kawhill]

Hey, no sweat, I plant trees, they absorb carbon dioxide and turn it into oxygen. I say plant more trees!

[Bobbyvotes]

CO2 levels record goes back how many years? 500 years? 1000 years?

Earth is 4,500,000,000 years old. So we have data for 0.000222% of earth’s life.

As a career engineer I ignore any data less than 66%.

[tumblindice]

Look how they massacred my boy. Mother Gaia

[Texas Eagle]

Auuuuuuugh!!!

It's skyrocketed from .0427% of the atmosphere to .0430% of the atmosphere!

Just one question, Chief. What is the rest of the atmosphere comprised of?

[butlerweave]

.04% CO2 , OMG ,LOL

[Leaning Right]

> Earth’s atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years <

Here we see NBC’s chief scientist trying to extend that assertion to hundreds of millions of years.

[ckilmer]

considering the real danger is snowball earth because we’re in the middle of a record low cooling period — more CO2 can’t be a bad thing.

[GaltAdonis]

“…skyrocketed from .0427% of the atmosphere to .0430% of the atmosphere! …”

.

Oh! I feel faint! I’m going to Die!

Goodbye cruel World!

/sarc

[clearcarbon]

"Earth's atmosphere hasn't had this much CO2 in millions of years"

We need green hamasholes protesting on the slopes and crater edge of the offending volcanos.

[JBW1949]

Boy, the plants (our food source) are loving the CO2....

[JBW1949]

Boy, the plants (our food source) are loving the CO2....