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https://oschina.net

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
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.89g CO2 per view
FIX
1.89g CO2 per view
Warning::
1.89g CO2 per page view
This page transfers 6.7 MB, producing an estimated 1.89g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.35g, network 0.33g, end-user device 1.22g.
Got: 1.89g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 227.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 227.3 kg of CO2 annually — equivalent to charging 28411 smartphones.

1.89g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 14% of websites

Sustainable Web Design model v4 · Page size: 6.7 MB

Your site
1.89g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.35g
Network
0.33g
End-user device
1.22g
At 10,000 monthly views: Monthly: 18.9 kg · Annual: 227.3 kg · ≈ 28411 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
86th percentile
FIX
86th percentile
Warning::
1.89g CO2 — above the median website (0.60g)
Heavier than an estimated 14% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 86th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.89g

86th percentile

Cleaner than 14% of websites

✗ Above the median website

vs Median 216% more
vs Target 279% 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
100% cached
PASS
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 1 KB (vs 6848 KB first visit). 231 of 232 resources are served from browser cache, saving 1.89g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.89g)
First visit
6848 KB
Repeat visit
1 KB

100% reduction on repeat visits

Saving 1.89g CO2 per returning visitor

231 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
91% efficient
PASS
91% efficient
Info::
Transfer efficiency: 91%
Only 646 KB of potential savings identified. Your page is well-optimized for size.
91% efficient

Total waste: 646 KB (9% of page weight)

Unused JS 646 KB

0.18g unnecessary CO2 per visit

Actual transfer 6848 KB
Theoretical minimum 6202 KB
Potential savings 646 KB (0.18g 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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