12gramsofcarbon.com

12 Grams of Carbon | theahura | Substack

Body text: SF Pro
Headings: SF Pro

Last checked Sep 23, 2026. Run this site and want it removed? Request an opt-out.

All text on the page

SF Pro67%Weights 400, 600, 700
system-ui33%Weights 400, 500, 600

Loading

Served by: Google Fonts
Font files: 14 KB
Preloaded fonts: 0
Families declared: 1
Platform: Custom or unknown
Font hosts: fonts.gstatic.com

History

Each row is a stretch of time where the fonts stayed the same. Rows marked Web archive are estimates from saved copies of the page and less reliable than our own crawl.

Sep 23, 2026Our crawlSF Pro

Every font face the page declares (1)

Family as declared	Weights	Variable	Used
Spectral	400, 600	No	Yes