On fidelity.com, advertising and tracking add ≈ 8,679 g CO₂ per million pageviews (141 g from ad-serving alone) — 1.7× the index average, cleaner than 18% of the sites we measure.
Ad-relevant
8679
g CO₂ / 1M pageviews
Ad-serving only
141
g CO₂ / 1M pageviews
104
kg CO₂ / year at 1M pageviews per month
18
% cleaner than the DACH index
98
% 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 →