On cardekho.com, advertising and tracking add ≈ 30,632 g CO₂ per million pageviews (15,982 g from ad-serving alone) — 5.8× the index average, cleaner than 2% of the sites we measure.
Ad-relevant
30632
g CO₂ / 1M pageviews
Ad-serving only
15982
g CO₂ / 1M pageviews
368
kg CO₂ / year at 1M pageviews per month
2
% cleaner than the DACH index
48
% 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 →