On cbssports.com, advertising and tracking add ≈ 4,817 g CO₂ per million pageviews (2,211 g from ad-serving alone) — 0.9× the index average, cleaner than 32% of the sites we measure.
Ad-relevant
4817
g CO₂ / 1M pageviews
Ad-serving only
2211
g CO₂ / 1M pageviews
58
kg CO₂ / year at 1M pageviews per month
32
% cleaner than the DACH index
54
% 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 →