On hotelplan.ch, advertising and tracking add ≈ 1,024 g CO₂ per million pageviews (118 g from ad-serving alone) — 0.2× the index average, cleaner than 60% of the sites we measure.
Ad-relevant
1024
g CO₂ / 1M pageviews
Ad-serving only
118
g CO₂ / 1M pageviews
12
kg CO₂ / year at 1M pageviews per month
60
% cleaner than the DACH index
88
% 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 →