On bigw.com.au, advertising and tracking add ≈ 23,382 g CO₂ per million pageviews (3,879 g from ad-serving alone) — 4.5× the index average, cleaner than 5% of the sites we measure.
Ad-relevant
23382
g CO₂ / 1M pageviews
Ad-serving only
3879
g CO₂ / 1M pageviews
281
kg CO₂ / year at 1M pageviews per month
5
% cleaner than the DACH index
83
% 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 →