Skip to content
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
0
REVIEW
3
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 3 REVIEW
B
CO2 Per Page Load
0.63g CO2 per view
REVIEW
0.63g CO2 per view
Info::
0.63g CO2 per page view
This page transfers 2.6 MB, producing an estimated 0.63g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.48g.
Got: 0.63g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 75.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 75.0 kg of CO2 annually — equivalent to charging 9379 smartphones.
Info::
Green hosting reduces data center emissions

0.63g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 50% of websites

Sustainable Web Design model v4 · Page size: 2.6 MB

Your site
0.63g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.13g
End-user device
0.48g
At 10,000 monthly views: Monthly: 6.3 kg · Annual: 75.0 kg · ≈ 9379 smartphone charges
B
Carbon Budget
50th percentile
REVIEW
50th percentile
Warning::
0.63g CO2 — above the median website (0.60g)
Heavier than an estimated 50% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 50th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.63g

50th percentile

Cleaner than 50% of websites

✗ Above the median website

vs Median 4% more
vs Target 25% more
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Green Hosting
Green (cdn)
PASS
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 Weight
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 104 KB (vs 2705 KB first visit). 67 of 69 resources are served from browser cache, saving 0.60g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.63g)
First visit
2705 KB
Repeat visit
104 KB

96% reduction on repeat visits

Saving 0.60g CO2 per returning visitor

67 resources served from cache · 2 resources re-downloaded

A+
Transfer Efficiency
100% efficient
PASS
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
100% efficient
Actual transfer 2705 KB
Theoretical minimum 2705 KB

See Deep Analysis sections above for specific optimizations.

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback