On coolmathgames.com, advertising and tracking add ≈ 16,071 g CO₂ per million pageviews (8,577 g from ad-serving alone) — 3.1× the index average, cleaner than 9% of the sites we measure.
Ad-relevant
16071
g CO₂ / 1M pageviews
Ad-serving only
8577
g CO₂ / 1M pageviews
193
kg CO₂ / year at 1M pageviews per month
9
% cleaner than the DACH index
47
% 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 →