On theguardian.com, advertising and tracking add ≈ 8,115 g CO₂ per million pageviews (7,902 g from ad-serving alone) — 1.5× the index average, cleaner than 20% of the sites we measure.
Ad-relevant
8115
g CO₂ / 1M pageviews
Ad-serving only
7902
g CO₂ / 1M pageviews
97
kg CO₂ / year at 1M pageviews per month
20
% cleaner than the DACH index
3
% 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 →