Hacker News Reader

My comment only explains how it's done. I'm sure you can understand that the article I mentioned was just an example. If you're looking for a specific CO2 measurement from air captured exactly one hundred and fifty years ago, I'll leave you to Google that yourself.

View on HN

Well, here's the only solid thing with referenced figures that came up. Chart on page one is quite the ride, as I'd have expected for early science:

https://21sci-tech.com/Subscriptions/Spring%202008%20ONLINE/...

Everything else I found was unfortunately hand-wavy "scientific consensus says" and the ubiquitous "280ppm" coupled with "pre-industrial" repeated again without reference, nor apparent empirical basis.

Not convincing, which for "the science is settled" I'd expect a bit of a higher standard.

Reply on news.ycombinator.com