On weather.com, advertising and tracking add ≈ 36,673 g CO₂ per million pageviews (34,626 g from ad-serving alone) — 7.0× the index average, cleaner than 1% of the sites we measure.
Ad-relevant
36673
g CO₂ / 1M pageviews
Ad-serving only
34626
g CO₂ / 1M pageviews
440
kg CO₂ / year at 1M pageviews per month
1
% cleaner than the DACH index
6
% 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 →