On letras.mus.br, advertising and tracking add ≈ 4,765 g CO₂ per million pageviews (4,010 g from ad-serving alone) — 0.9× the index average, cleaner than 33% of the sites we measure.
Ad-relevant
4765
g CO₂ / 1M pageviews
Ad-serving only
4010
g CO₂ / 1M pageviews
57
kg CO₂ / year at 1M pageviews per month
33
% 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 →