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https://pconline.com.cn

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
68
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
1.56g CO2 per view
FIX
1.56g CO2 per view
Warning::
1.56g CO2 per page view
This page transfers 5.5 MB, producing an estimated 1.56g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.29g, network 0.27g, end-user device 1.00g.
Got: 1.56g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 187.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 187.0 kg of CO2 annually — equivalent to charging 23373 smartphones.

1.56g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 23% of websites

Sustainable Web Design model v4 · Page size: 5.5 MB

Your site
1.56g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.29g
Network
0.27g
End-user device
1.00g
At 10,000 monthly views: Monthly: 15.6 kg · Annual: 187.0 kg · ≈ 23373 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
77th percentile
FIX
77th percentile
Warning::
1.56g CO2 — above the median website (0.60g)
Heavier than an estimated 23% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 77th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.56g

77th percentile

Cleaner than 23% of websites

✗ Above the median website

vs Median 160% more
vs Target 212% 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
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 58 KB (vs 5634 KB first visit). 188 of 189 resources are served from browser cache, saving 1.54g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.56g)
First visit
5634 KB
Repeat visit
58 KB

99% reduction on repeat visits

Saving 1.54g CO2 per returning visitor

188 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
99% efficient
PASS
99% efficient
Info::
Transfer efficiency: 99%
Only 40 KB of potential savings identified. Your page is well-optimized for size.
99% efficient

Total waste: 40 KB (1% of page weight)

Unused JS 40 KB

0.01g unnecessary CO2 per visit

Actual transfer 5634 KB
Theoretical minimum 5594 KB
Potential savings 40 KB (0.01g 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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