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https://ku.dk

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
70
GRADE
C
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
D
CO2 Per Page Load
Action
0.80g CO2 per view
FIX
0.80g CO2 per view
Info::
0.80g CO2 per page view
This page transfers 2.8 MB, producing an estimated 0.80g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.15g, network 0.14g, end-user device 0.51g.
Got: 0.80g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 96.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 96.2 kg of CO2 annually — equivalent to charging 12029 smartphones.

0.80g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 45% of websites

Sustainable Web Design model v4 · Page size: 2.8 MB

Your site
0.80g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.15g
Network
0.14g
End-user device
0.51g
At 10,000 monthly views: Monthly: 8.0 kg · Annual: 96.2 kg · ≈ 12029 smartphone charges
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

D
Carbon Budget
Action
55th percentile
FIX
55th percentile
Warning::
0.80g CO2 — above the median website (0.60g)
Heavier than an estimated 45% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 55th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.80g

55th percentile

Cleaner than 45% of websites

✗ Above the median website

vs Median 34% more
vs Target 60% more
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 38 KB (vs 2899 KB first visit). 41 of 43 resources are served from browser cache, saving 0.79g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.80g)
First visit
2899 KB
Repeat visit
38 KB

99% reduction on repeat visits

Saving 0.79g CO2 per returning visitor

41 resources served from cache · 2 resources re-downloaded

A+
Transfer Efficiency
93% efficient
PASS
93% efficient
Info::
Transfer efficiency: 93%
Only 198 KB of potential savings identified. Your page is well-optimized for size.
93% efficient

Total waste: 198 KB (7% of page weight)

Unused JS 198 KB

0.05g unnecessary CO2 per visit

Actual transfer 2899 KB
Theoretical minimum 2701 KB
Potential savings 198 KB (0.05g CO2)

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.

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