https://cityautosglobal.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
73
GRADE
C
FIX
2
REVIEW
4
PASS
1
INFO
1
Checks
81 PASS 4 REVIEW 2 FIX
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
DCarbon BudgetAction51th percentileFIX
Carbon Budget
Action51th percentile
51th percentile
Warning::
0.66g CO2 — above the median website (0.60g)
Heavier than an estimated 49% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 51th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.66g
51st percentile
Cleaner than 49% of websites
✗ Above the median website
vs Median 10% more
vs Target 32% more
BCO2 Per Page Load0.66g CO2 per viewREVIEW
CO2 Per Page Load
0.66g CO2 per view
0.66g CO2 per view
Info::
0.66g CO2 per page view
This page transfers 2.3 MB, producing an estimated 0.66g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.12g, network 0.11g, end-user device 0.42g.
Got: 0.66g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 79.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 79.3 kg of CO2 annually — equivalent to charging 9912 smartphones.
0.66g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 49% of websites
Sustainable Web Design model v4 · Page size: 2.3 MB
Your site
0.66g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.12g
Network
0.11g
End-user device
0.42g
At 10,000 monthly views: Monthly: 6.6 kg · Annual: 79.3 kg · ≈ 9912 smartphone charges
BTransfer Efficiency79% efficientREVIEW
Transfer Efficiency
79% efficient
79% efficient
Info::
Transfer efficiency: 79%
An estimated 499 KB (21%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 499 KB of unused JavaScript. This wasted data produces 0.14g of unnecessary CO2 per page view.
Total waste: 499 KB (21% of page weight)
Unused JS 499 KB
0.14g unnecessary CO2 per visit
Actual transfer 2389 KB
Theoretical minimum 1889 KB
Potential savings 499 KB (0.14g 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 37 KB (vs 2389 KB first visit). 66 of 68 resources are served from browser cache, saving 0.65g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.66g)
First visit
2389 KB
Repeat visit
37 KB
98% reduction on repeat visits
Saving 0.65g CO2 per returning visitor
66 resources served from cache · 2 resources re-downloaded
Image Optimization76 images, 1923 KB total, 509 KB wastedINFO
Image Optimization
76 images, 1923 KB total, 509 KB wasted
Image Optimization Audit
Total Images
76
Total Size
1923 KB
Oversized
21
Wasted
509 KB
76 missing dimensions 37 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.