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Peter Gleick
Peter Gleick
@petergleick@fediscience.org  ·  activity timestamp 18 hours ago

You are here.
We've breached 430 ppm CO2.
#climatechange

Graph of CO2 concentrations for the past 800,000 years from the Antarctic ice cores, showing current CO2 levels of 430 ppm are far, far higher than any level over this period, which never exceeded 300 ppm. Also shown is the emergence of Homo sapiens around 200,000 years ago -- so CO2 levels are higher than humans have ever experienced.
Graph of CO2 concentrations for the past 800,000 years from the Antarctic ice cores, showing current CO2 levels of 430 ppm are far, far higher than any level over this period, which never exceeded 300 ppm. Also shown is the emergence of Homo sapiens around 200,000 years ago -- so CO2 levels are higher than humans have ever experienced.
Graph of CO2 concentrations for the past 800,000 years from the Antarctic ice cores, showing current CO2 levels of 430 ppm are far, far higher than any level over this period, which never exceeded 300 ppm. Also shown is the emergence of Homo sapiens around 200,000 years ago -- so CO2 levels are higher than humans have ever experienced.
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Nick44 🇪🇺 🇮🇹
Nick44 🇪🇺 🇮🇹
@Nick44@social.vivaldi.net replied  ·  activity timestamp 8 hours ago

@petergleick the problem isnt' the absolute value of 430pm (or in future much more) becasue millions year ago it was so much higher.

the real problem is the rapid change: animals and environments hasn't enought time to adapt

co2 graph until 400millions year ago
co2 graph until 400millions year ago
co2 graph until 400millions year ago
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@iveyline
@iveyline
@Iveyline@mastodon.nz replied  ·  activity timestamp 11 hours ago

@petergleick And its still going up.

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Taran Rampersad
Taran Rampersad
@knowprose@mastodon.social replied  ·  activity timestamp 14 hours ago

@petergleick yup. 870 ppm is getting mighty close with thst gradient.

This from 2023:

"...That would be edging close to the average CO2 concentrations (870 ppmv) associated with huge crashes in marine biodiversity over the last 534 million years, according to a study published June 22 in the journal Earth's Future..."

https://www.livescience.com/planet-earth/climate-change/19-mass-extinctions-had-co2-levels-were-now-veering-towards-study-warns

Live Science

19 'mass extinctions' had CO2 levels we're now veering toward, study warns

The research looked at peaks in biodiversity loss and their relationship with atmospheric CO2, finding 50 events over the last 534 million years that can be considered mass extinctions.
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Richard
Richard
@Richard@noauthority.social replied  ·  activity timestamp 15 hours ago

@petergleick seek Canadian Healthcare

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Flaming Cheeto
Flaming Cheeto
@PizzaDemon@mastodon.online replied  ·  activity timestamp 16 hours ago

@petergleick

Same graph as original post but with an added arrow pointing to 340 ppm. Annotated " when I learned what the atmosphere was made of in junior high"
Same graph as original post but with an added arrow pointing to 340 ppm. Annotated " when I learned what the atmosphere was made of in junior high"
Same graph as original post but with an added arrow pointing to 340 ppm. Annotated " when I learned what the atmosphere was made of in junior high"
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slotos
slotos
@slotos@toot.community replied  ·  activity timestamp 16 hours ago

@petergleick So we’re rushing into territory where human cognitive capabilities measurably suffer, aren’t we?

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Solitarius Sortiarius
Solitarius Sortiarius
@ErisSire@discordian.social replied  ·  activity timestamp 17 hours ago

@petergleick looking Stable!

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Monkey Boy
Monkey Boy
@ruprecht@noauthority.social replied  ·  activity timestamp 17 hours ago

@petergleick

So what? Imagine you're a kid: grown-ups scream your car exhaust (CO2) melts the Earth like ice cream. Bad science! CO2 feeds plants, greens the planet, boosts crops. It's just 0.04% of air—doubling it won't boil us. Earth was hotter with more CO2; life boomed. Storms? Always happened.

Jobs hoax: Kills coal/oil gigs for wind/solar (fewer jobs, pricey, fragile). Elites hike energy costs, empower China polluters. Fossils lifted us—use smart, keep working. Don't panic; question it!

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crumbletiltskin
crumbletiltskin
@crumbletiltskin@mastodon.social replied  ·  activity timestamp 17 hours ago

@petergleick 6 points in 2 years?

https://www.statista.com/statistics/1091926/atmospheric-concentration-of-co2-historic/

Statista

Atmospheric CO2 ppm by year 1959-2024| Statista

The average global atmospheric CO₂ concentration has increased by almost 20 percent since 1990, and set a record high in 2022.
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Абдульзефир
Абдульзефир
@Abdulzefir@social.vivaldi.net replied  ·  activity timestamp 17 hours ago

@petergleick for planet it's nothing. humans are no more than ants and threaten nothing but themselves.

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GhostOnTheHalfShell
GhostOnTheHalfShell
@GhostOnTheHalfShell@masto.ai replied  ·  activity timestamp 18 hours ago

@petergleick

Emissions keep going up, and more and more of the planet continues to be pillaged, poisoned, razed or paved over. The insects are dying. The animals are dying. The plants are dying. The soil is dying, which happens to have twice as much carbon and water in it relative to the vegetation on top so the productive capacity, the biomass, is collapsing, along with the hydrological and carbon cycling this implies. And these crazy huge dams which turn countryside into methane

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Nicole Parsons
Nicole Parsons
@Npars01@mstdn.social replied  ·  activity timestamp 18 hours ago

@petergleick

The fossil fuel industry is funding an extinction level event.

https://www.nytimes.com/2025/12/20/us/politics/koch-network-2024-election-trump.html

https://www.nytimes.com

Koch Political Operation Spent Nearly $550 Million During 2024 Cycle

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Kim Possible :kimoji_fire:
Kim Possible :kimoji_fire:
@kimlockhartga@beige.party replied  ·  activity timestamp 18 hours ago

@petergleick no wonder we all have hacking coughs.

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