On espn.com.au, advertising and tracking add ≈ 9,355 g CO₂ per million pageviews (6,348 g from ad-serving alone) — 1.8× the index average, cleaner than 17% of the sites we measure.
Ad-relevant
9355
g CO₂ / 1M pageviews
Ad-serving only
6348
g CO₂ / 1M pageviews
112
kg CO₂ / year at 1M pageviews per month
17
% cleaner than the DACH index
32
% 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 →