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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
62
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
5.24g CO2 per view
FIX
5.24g CO2 per view
Critical::
5.24g CO2 per page view
This page transfers 22.1 MB, producing an estimated 5.24g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.13g, network 1.08g, end-user device 4.02g.
Got: 5.24g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 628.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 628.6 kg of CO2 annually — equivalent to charging 78576 smartphones.
Info::
Green hosting reduces data center emissions

5.24g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 22.1 MB

Your site
5.24g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.13g
Network
1.08g
End-user device
4.02g
At 10,000 monthly views: Monthly: 52.4 kg · Annual: 628.6 kg · ≈ 78576 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
5.24g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

5.24g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 773% more
vs Target 948% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Sitevision AB uses renewable energy
Info::
Sitevision AB: Verified by the Green Web Foundation
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 Sitevision AB✓CDN Not identified✗

Sitevision AB: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
100% cached
PASS
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 22 KB (vs 22663 KB first visit). 91 of 92 resources are served from browser cache, saving 5.23g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 5.24g)
First visit
22663 KB
Repeat visit
22 KB

100% reduction on repeat visits

Saving 5.23g CO2 per returning visitor

91 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
99% efficient
PASS
99% efficient
Info::
Transfer efficiency: 99%
Only 216 KB of potential savings identified. Your page is well-optimized for size.
99% efficient

Total waste: 216 KB (1% of page weight)

Unused JS 216 KB

0.05g unnecessary CO2 per visit

Actual transfer 22663 KB
Theoretical minimum 22447 KB
Potential savings 216 KB (0.05g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Sitevision AB

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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