On wegwandern.ch, advertising and tracking add ≈ 1,182 g CO₂ per million pageviews (956 g from ad-serving alone) — 0.2× the index average, cleaner than 57% of the sites we measure.
Ad-relevant
1182
g CO₂ / 1M pageviews
Ad-serving only
956
g CO₂ / 1M pageviews
14
kg CO₂ / year at 1M pageviews per month
57
% cleaner than the DACH index
19
% 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 →