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https://aliyun.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
56
GRADE
D
FIX
3
REVIEW
2
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 2 REVIEW 3 FIX
D
CO2 Per Page Load
Action
1.44g CO2 per view
FIX
1.44g CO2 per view
Warning::
1.44g CO2 per page view
This page transfers 5.1 MB, producing an estimated 1.44g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.27g, network 0.25g, end-user device 0.93g.
Got: 1.44g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 173.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 173.2 kg of CO2 annually — equivalent to charging 21655 smartphones.

1.44g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 26% of websites

Sustainable Web Design model v4 · Page size: 5.1 MB

Your site
1.44g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.27g
Network
0.25g
End-user device
0.93g
At 10,000 monthly views: Monthly: 14.4 kg · Annual: 173.2 kg · ≈ 21655 smartphone charges
D
Green Hosting
Action
Not green
FIX
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

F
Carbon Budget
Action
74th percentile
FIX
74th percentile
Warning::
1.44g CO2 — above the median website (0.60g)
Heavier than an estimated 26% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 74th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.44g

74th percentile

Cleaner than 26% of websites

✗ Above the median website

vs Median 141% more
vs Target 189% more
C
Transfer Efficiency
Action
65% efficient
REVIEW
65% efficient
Warning::
Transfer efficiency: 65%
An estimated 1849 KB (35%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1849 KB of unused JavaScript. This wasted data produces 0.51g of unnecessary CO2 per page view.
65% efficient

Total waste: 1849 KB (35% of page weight)

Unused JS 1849 KB

0.51g unnecessary CO2 per visit

Actual transfer 5220 KB
Theoretical minimum 3370 KB
Potential savings 1849 KB (0.51g CO2)

See Deep Analysis sections above for specific optimizations.

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 26 KB (vs 5220 KB first visit). 198 of 201 resources are served from browser cache, saving 1.44g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.44g)
First visit
5220 KB
Repeat visit
26 KB

99% reduction on repeat visits

Saving 1.44g CO2 per returning visitor

198 resources served from cache · 3 resources re-downloaded

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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