On 13.cl, advertising and tracking add ≈ 14,929 g CO₂ per million pageviews (8,280 g from ad-serving alone) — 2.8× the index average, cleaner than 10% of the sites we measure.
Ad-relevant
14929
g CO₂ / 1M pageviews
Ad-serving only
8280
g CO₂ / 1M pageviews
179
kg CO₂ / year at 1M pageviews per month
10
% cleaner than the DACH index
45
% 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 →