https://campaignmonitor.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
85
GRADE
B
FIX
1
REVIEW
3
PASS
2
INFO
0
Checks
62 PASS 3 REVIEW 1 FIX
DCarbon BudgetAction51th percentileFIX
Carbon Budget
Action51th percentile
51th percentile
Warning::
0.64g CO2 — above the median website (0.60g)
Heavier than an estimated 49% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 51th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.64g
51st percentile
Cleaner than 49% of websites
✗ Above the median website
vs Median 7% more
vs Target 28% more
BCO2 Per Page Load0.64g CO2 per viewREVIEW
CO2 Per Page Load
0.64g CO2 per view
0.64g CO2 per view
Info::
0.64g CO2 per page view
This page transfers 2.7 MB, producing an estimated 0.64g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.49g.
Got: 0.64g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 77.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 77.0 kg of CO2 annually — equivalent to charging 9630 smartphones.
Info::
Green hosting reduces data center emissions
0.64g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 49% of websites
Sustainable Web Design model v4 · Page size: 2.7 MB
Your site
0.64g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.13g
End-user device
0.49g
At 10,000 monthly views: Monthly: 6.4 kg · Annual: 77.0 kg · ≈ 9630 smartphone charges
BTransfer Efficiency75% efficientREVIEW
Transfer Efficiency
75% efficient
75% efficient
Info::
Transfer efficiency: 75%
An estimated 684 KB (25%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 684 KB of unused JavaScript. This wasted data produces 0.16g of unnecessary CO2 per page view.
Total waste: 684 KB (25% of page weight)
Unused JS 684 KB
0.16g unnecessary CO2 per visit
Actual transfer 2777 KB
Theoretical minimum 2093 KB
Potential savings 684 KB (0.16g CO2)
See Deep Analysis sections above for specific optimizations.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Cloudflare: 100% renewable energy for global network since 2019
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green Hosting✓ Green Hosted
Hosting Amazon Web Services✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 104 KB (vs 2777 KB first visit). 68 of 70 resources are served from browser cache, saving 0.62g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.64g)
First visit
2777 KB
Repeat visit
104 KB
96% reduction on repeat visits
Saving 0.62g CO2 per returning visitor
68 resources served from cache · 2 resources re-downloaded
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.