Connect with us

Hi, what are you looking for?

CleanTechnica

Climate Change

Why The 400 PPM Milestone Is Irrelevant

This article was originally published on Lenz Blog.

There are multiple people on my Twitter timeline mentioning the fact that CO2 levels have passed 400 ppM for the first time. Let’s just point to this well informed and interesting explanation by Peter Gleick on Scienceblogs, titled “The Last Time Atmospheric CO2 was at 400 parts per Million Humans Didn’t Exist.”

As Gleick explains, 400 ppM means an ice-free Arctic, average temperatures up between 3 and 4 degrees Celsius, and over 10 degrees at the poles, sea levels between 5 and 40 meters higher.

So why do I think this is irrelevant?

The answer is easy.

Anyone paying attention knew a long time ago that we will reach 400 and blow right past it. The fine people at 350.org want humanity to keep CO2 levels under 350. That is not likely to happen any time soon.

To explain this with a little comparison to Bitcoin, it didn’t matter much if the price was at $2 or at $5 some time in 2011. It was always sure to go way up anyway (it is around $110  now).

The one thing that matters most is if humanity somehow will be able to avoid the positive feedback spiral leading to Venus syndrome. This question has only two possible answers.

In contrast, assuming stabilizing at some level or other of global warming, that is a question of degree. While much would change, there would still be at least some life left on the planet, possibly even human life.

For all of that, blasting through 400 ppM is not ever so important. The real fight will come in the next couple of decades.


Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

is a professor of German and European Law at Aoyama Gakuin University in Tokyo, blogging since 2003 at Lenz Blog. A free PDF file of his global warming science fiction novel "Great News" is available here.

Comments

#1 most loved electric vehicle, solar energy, and battery news & analysis site in the world.

 

Support our work today!

Advertisement

Power CleanTechnica: $3/Month

Tesla News Solar News EV News Data Reports

Advertisement

EV Sales Charts, Graphs, & Stats

Advertisement

Our Electric Car Driver Report

30 Electric Car Benefits

Tesla Model 3 Video

Renewable Energy 101 In Depth

solar power facts

Tesla News

EV Reviews

Home Efficiency

You May Also Like

Climate Change

Courtesy of The National Oceanographic and Atmospheric Administration (NOAA). Every 10 years, NOAA releases an analysis of U.S. weather of the past three decades...

Climate Change

Increasingly frequent power failures combined with heatwaves fueled by climate change pose severe, compounding threats to major American cities, new research suggests. The study,...

Clean Power

A gas-and-electric utility dreams of a decarbonized future for the US with an assist from green hydrogen and long duration energy storage.

Buildings

Q&A with LA100 Study Lead Jaquelin Cochran For decades, power system planning has optimized costs and efficiency over the experiences of some communities, meaning...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.