On bt.dk, advertising and tracking add ≈ 9,836 g CO₂ per million pageviews (8,285 g from ad-serving alone) — 1.9× the index average, cleaner than 16% of the sites we measure.
Ad-relevant
9836
g CO₂ / 1M pageviews
Ad-serving only
8285
g CO₂ / 1M pageviews
118
kg CO₂ / year at 1M pageviews per month
16
% cleaner than the DACH index
16
% 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 →