https://huangguoai.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
78
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.42g CO2 per viewFIX
CO2 Per Page Load
Action1.42g CO2 per view
1.42g CO2 per view
Warning::
1.42g CO2 per page view
This page transfers 6.0 MB, producing an estimated 1.42g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.29g, end-user device 1.09g.
Got: 1.42g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 170.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 170.0 kg of CO2 annually — equivalent to charging 21248 smartphones.
Info::
Green hosting reduces data center emissions
1.42g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 27% of websites
Sustainable Web Design model v4 · Page size: 6.0 MB
Your site
1.42g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.29g
End-user device
1.09g
At 10,000 monthly views: Monthly: 14.2 kg · Annual: 170.0 kg · ≈ 21248 smartphone charges
FCarbon BudgetAction73th percentileFIX
Carbon Budget
Action73th percentile
73th percentile
Warning::
1.42g CO2 — above the median website (0.60g)
Heavier than an estimated 27% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 73th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.42g
73rd percentile
Cleaner than 27% of websites
✗ Above the median website
vs Median 136% more
vs Target 183% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
AWS uses renewable energy
Info::
AWS: Verified by the Green Web Foundation
Info::
AWS CloudFront: Renewable varies by edge location
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 Hosting✓ Green Hosted
Hosting AWS✓CDN AWS CloudFront✗
AWS: Verified by the Green Web Foundation
AWS CloudFront: Renewable varies by edge location
Based on known provider commitments. Verify at thegreenwebfoundation.org
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.
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 43 KB (vs 6128 KB first visit). 90 of 91 resources are served from browser cache, saving 1.41g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.42g)
First visit
6128 KB
Repeat visit
43 KB
99% reduction on repeat visits
Saving 1.41g CO2 per returning visitor
90 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 198 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 198 KB (3% of page weight)
Unused JS 198 KB
0.05g unnecessary CO2 per visit
Actual transfer 6128 KB
Theoretical minimum 5930 KB
Potential savings 198 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Image Optimization85 images, 2310 KB total, 33 KB wastedINFO
Image Optimization
85 images, 2310 KB total, 33 KB wasted
Image Optimization Audit
Total Images
85
Total Size
2310 KB
Oversized
1
Wasted
33 KB
6 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.