On rumbo.es, advertising and tracking add ≈ 1,180 g CO₂ per million pageviews (287 g from ad-serving alone) — 0.2× the index average, cleaner than 58% of the sites we measure.
Ad-relevant
1180
g CO₂ / 1M pageviews
Ad-serving only
287
g CO₂ / 1M pageviews
14
kg CO₂ / year at 1M pageviews per month
58
% cleaner than the DACH index
76
% 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 →