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Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
60
GRADE
D
FIX
3
REVIEW
2
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 2 REVIEW 3 FIX
D
CO2 Per Page Load
Action
1.34g CO2 per view
FIX
1.34g CO2 per view
Warning::
1.34g CO2 per page view
This page transfers 4.7 MB, producing an estimated 1.34g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.25g, network 0.23g, end-user device 0.86g.
Got: 1.34g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 161.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 161.0 kg of CO2 annually — equivalent to charging 20129 smartphones.

1.34g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 29% of websites

Sustainable Web Design model v4 · Page size: 4.7 MB

Your site
1.34g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.25g
Network
0.23g
End-user device
0.86g
At 10,000 monthly views: Monthly: 13.4 kg · Annual: 161.0 kg · ≈ 20129 smartphone charges
D
Green Hosting
Action
Not green
FIX
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting WordPress VIP✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
71th percentile
FIX
71th percentile
Warning::
1.34g CO2 — above the median website (0.60g)
Heavier than an estimated 29% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 71th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.34g

71st percentile

Cleaner than 29% of websites

✗ Above the median website

vs Median 124% more
vs Target 168% more
B
Transfer Efficiency
79% efficient
REVIEW
79% efficient
Info::
Transfer efficiency: 79%
An estimated 1012 KB (21%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1012 KB of unused JavaScript. This wasted data produces 0.28g of unnecessary CO2 per page view.
79% efficient

Total waste: 1012 KB (21% of page weight)

Unused JS 1012 KB

0.28g unnecessary CO2 per visit

Actual transfer 4852 KB
Theoretical minimum 3839 KB
Potential savings 1012 KB (0.28g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
93% cached
PASS
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 323 KB (vs 4852 KB first visit). 455 of 507 resources are served from browser cache, saving 1.25g CO2 per repeat visit.
Info::
Repeat visit: 0.09g CO2 (first visit: 1.34g)
First visit
4852 KB
Repeat visit
323 KB

93% reduction on repeat visits

Saving 1.25g CO2 per returning visitor

455 resources served from cache · 52 resources re-downloaded

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

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