On swissmilk.ch, advertising and tracking add ≈ 1,349 g CO₂ per million pageviews (13 g from ad-serving alone) — 0.3× the index average, cleaner than 54% of the sites we measure.
Ad-relevant
1349
g CO₂ / 1M pageviews
Ad-serving only
13
g CO₂ / 1M pageviews
16
kg CO₂ / year at 1M pageviews per month
54
% cleaner than the DACH index
99
% 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 →