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Environment & Energy

OKIsItJustMe

(21,647 posts)

4. My key point is that figure of 350 ppm

Reply to hatrack (Reply #2)

Tue Jul 15, 2025, 12:26 PM

Jul 15

(Does anyone remember where the name 350.org came from?)

350 ppm was not suggested as an end goal, but as an initial target, the logic being that once we lowered atmospheric CO₂ to that point, we would have developed methods to accomplish it, and we could continue using those methods to lower atmospheric CO₂ to a level determined to be “safe.”

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Highlight:

June 2025 Atmospheric CO2 Content 429.61 ppm; June 2024 426.91 ppm; June 2023 423.68 ppm [View all] hatrack Jul 15 OP

Target Atmospheric CO2: Where Should Humanity Aim? - Hansen, et al. OKIsItJustMe Jul 15 #1

Yes, a paper from seventeen years ago . . . hatrack Jul 15 #2

Climate impact of increasing atmospheric carbon dioxide. - Hansen et al. 1981 OKIsItJustMe Jul 15 #3

My key point is that figure of 350 ppm OKIsItJustMe Jul 15 #4