On hommages.ch, advertising and tracking add ≈ 1,064 g CO₂ per million pageviews (319 g from ad-serving alone) — 0.2× the index average, cleaner than 59% of the sites we measure.
Ad-relevant
1064
g CO₂ / 1M pageviews
Ad-serving only
319
g CO₂ / 1M pageviews
13
kg CO₂ / year at 1M pageviews per month
59
% cleaner than the DACH index
70
% of the footprint is tracking overhead, not ad-serving
Measured on the live electricity grid from public page-load data — an estimate of a site's ad-tech architecture, not a measured campaign figure. See the methodology →