On xumo.com, advertising and tracking add ≈ 5,465 g CO₂ per million pageviews (33 g from ad-serving alone) — 1.0× the index average, cleaner than 29% of the sites we measure.
Ad-relevant
5465
g CO₂ / 1M pageviews
Ad-serving only
33
g CO₂ / 1M pageviews
66
kg CO₂ / year at 1M pageviews per month
29
% 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 →