On spiegel.de, advertising and tracking add ≈ 6,052 g CO₂ per million pageviews (5,351 g from ad-serving alone) — 1.2× the index average, cleaner than 26% of the sites we measure.
Ad-relevant
6052
g CO₂ / 1M pageviews
Ad-serving only
5351
g CO₂ / 1M pageviews
73
kg CO₂ / year at 1M pageviews per month
26
% cleaner than the DACH index
12
% 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 →