On decathlon.de, advertising and tracking add ≈ 6,637 g CO₂ per million pageviews (193 g from ad-serving alone) — 1.3× the index average, cleaner than 24% of the sites we measure.
Ad-relevant
6637
g CO₂ / 1M pageviews
Ad-serving only
193
g CO₂ / 1M pageviews
80
kg CO₂ / year at 1M pageviews per month
24
% cleaner than the DACH index
97
% 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 →