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https://demilked.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
59
GRADE
D
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
F
CO2 Per Page Load
Action
2.85g CO2 per view
FIX
2.85g CO2 per view
Critical::
2.85g CO2 per page view
This page transfers 10.1 MB, producing an estimated 2.85g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.53g, network 0.49g, end-user device 1.83g.
Got: 2.85g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 341.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 341.6 kg of CO2 annually — equivalent to charging 42694 smartphones.

2.85g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 10.1 MB

Your site
2.85g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.53g
Network
0.49g
End-user device
1.83g
At 10,000 monthly views: Monthly: 28.5 kg · Annual: 341.6 kg · ≈ 42694 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

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.85g 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

2.85g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 374% more
vs Target 469% 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
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 173 KB (vs 10291 KB first visit). 681 of 754 resources are served from browser cache, saving 2.80g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 2.85g)
First visit
10291 KB
Repeat visit
173 KB

98% reduction on repeat visits

Saving 2.80g CO2 per returning visitor

681 resources served from cache · 73 resources re-downloaded

A+
Transfer Efficiency
90% efficient
PASS
90% efficient
Info::
Transfer efficiency: 90%
Only 982 KB of potential savings identified. Your page is well-optimized for size.
90% efficient

Total waste: 982 KB (10% of page weight)

Unused JS 982 KB

0.27g unnecessary CO2 per visit

Actual transfer 10291 KB
Theoretical minimum 9309 KB
Potential savings 982 KB (0.27g 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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