css.ch scores D — 2,062 g CO₂ per million pageviews, 1.3× the DACH average, with 97% of that being tracking overhead rather than ad-serving.
Ad-relevant
2062
g CO₂ / 1M pageviews
Ad-serving only
62
g CO₂ / 1M pageviews
25
kg CO₂ / year at 1M pageviews per month
24
% cleaner than the DACH index
97
% 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 →