https://www.econ.sdu.edu.cn
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction9.23g CO2 per viewFIX
CO2 Per Page Load
Action9.23g CO2 per view
9.23g CO2 per view
Critical::
9.23g CO2 per page view
This page transfers 32.6 MB, producing an estimated 9.23g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 1.71g, network 1.60g, end-user device 5.93g.
Got: 9.23g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 1107.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 1107.9 kg of CO2 annually — equivalent to charging 138487 smartphones.
9.23g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 32.6 MB
Your site
9.23g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
1.71g
Network
1.60g
End-user device
5.93g
At 10,000 monthly views: Monthly: 92.3 kg · Annual: 1107.9 kg · ≈ 138487 smartphone charges
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
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
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
9.23g 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
9.23g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 1439% more
vs Target 1747% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 21 KB (vs 33383 KB first visit). 103 of 104 resources are served from browser cache, saving 9.23g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 9.23g)
First visit
33383 KB
Repeat visit
21 KB
100% reduction on repeat visits
Saving 9.23g CO2 per returning visitor
103 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency100% efficientPASS
Transfer Efficiency
100% efficient
100% efficient
Info::
Transfer efficiency: 100%
Only 25 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 25 KB (0% of page weight)
Unused JS 25 KB
0.01g unnecessary CO2 per visit
Actual transfer 33383 KB
Theoretical minimum 33357 KB
Potential savings 25 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization72 images, 50255 KB total, 30431 KB wastedINFO
Image Optimization
72 images, 50255 KB total, 30431 KB wasted
Image Optimization Audit
Total Images
72
Total Size
50255 KB
Oversized
27
Wasted
30431 KB
72 missing dimensions 65 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.