https://cn.aliyun.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
65
GRADE
D
FIX
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
DCO2 Per Page LoadAction1.38g CO2 per viewFIX
CO2 Per Page Load
Action1.38g CO2 per view
1.38g CO2 per view
Warning::
1.38g CO2 per page view
This page transfers 4.9 MB, producing an estimated 1.38g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.26g, network 0.24g, end-user device 0.89g.
Got: 1.38g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 166.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 166.0 kg of CO2 annually — equivalent to charging 20746 smartphones.
1.38g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 28% of websites
Sustainable Web Design model v4 · Page size: 4.9 MB
Your site
1.38g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.26g
Network
0.24g
End-user device
0.89g
At 10,000 monthly views: Monthly: 13.8 kg · Annual: 166.0 kg · ≈ 20746 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Tengine✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction72th percentileFIX
Carbon Budget
Action72th percentile
72th percentile
Warning::
1.38g CO2 — above the median website (0.60g)
Heavier than an estimated 28% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 72th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.38g
72nd percentile
Cleaner than 28% of websites
✗ Above the median website
vs Median 131% more
vs Target 177% more
BTransfer Efficiency77% efficientREVIEW
Transfer Efficiency
77% efficient
77% efficient
Info::
Transfer efficiency: 77%
An estimated 1127 KB (23%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1127 KB of unused JavaScript. This wasted data produces 0.31g of unnecessary CO2 per page view.
Total waste: 1127 KB (23% of page weight)
Unused JS 1127 KB
0.31g unnecessary CO2 per visit
Actual transfer 5001 KB
Theoretical minimum 3873 KB
Potential savings 1127 KB (0.31g CO2)
See Deep Analysis sections above for specific optimizations.
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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 49 KB (vs 5001 KB first visit). 173 of 175 resources are served from browser cache, saving 1.37g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.38g)
First visit
5001 KB
Repeat visit
49 KB
99% reduction on repeat visits
Saving 1.37g CO2 per returning visitor
173 resources served from cache · 2 resources re-downloaded
Image Optimization93 images, 1160 KB total, 1030 KB wastedINFO
Image Optimization
93 images, 1160 KB total, 1030 KB wasted
Image Optimization Audit
Total Images
93
Total Size
1160 KB
Oversized
8
Wasted
1030 KB
83 missing alt text 93 missing dimensions 4 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.