https://velorablackcar.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
70
GRADE
C
FIX
1
REVIEW
5
PASS
1
INFO
1
Checks
81 PASS 5 REVIEW 1 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
BCO2 Per Page Load0.59g CO2 per viewREVIEW
CO2 Per Page Load
0.59g CO2 per view
0.59g CO2 per view
Info::
0.59g CO2 per page view
This page transfers 2.1 MB, producing an estimated 0.59g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.11g, network 0.10g, end-user device 0.38g.
Got: 0.59g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 70.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 70.8 kg of CO2 annually — equivalent to charging 8847 smartphones.
0.59g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 52% of websites
Sustainable Web Design model v4 · Page size: 2.1 MB
Your site
0.59g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.11g
Network
0.10g
End-user device
0.38g
At 10,000 monthly views: Monthly: 5.9 kg · Annual: 70.8 kg · ≈ 8847 smartphone charges
BCarbon Budget48th percentileREVIEW
Carbon Budget
48th percentile
48th percentile
Info::
0.59g CO2 — below the median website (0.60g)
Better than an estimated 52% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 48th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.59g
48th percentile
Cleaner than 52% of websites
✗ Above the median website
vs Median 2% cleaner ✓
vs Target 18% more
BTransfer Efficiency87% efficientREVIEW
Transfer Efficiency
87% efficient
87% efficient
Info::
Transfer efficiency: 87%
An estimated 278 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 278 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
Total waste: 278 KB (13% of page weight)
Unused JS 278 KB
0.08g unnecessary CO2 per visit
Actual transfer 2132 KB
Theoretical minimum 1854 KB
Potential savings 278 KB (0.08g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction52 font weights loaded across 5 famil(y/ies)REVIEW
Web Font Weight Variants
Action52 font weights loaded across 5 famil(y/ies)
52 font weights loaded across 5 famil(y/ies)
Warning::
52 font weights loaded -- likely 100+ KB of unused payload
Loading 52 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Cormorant Garamond, Inter, Montserrat, Roboto, Roboto Slab.
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 Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 57 KB (vs 2132 KB first visit). 76 of 77 resources are served from browser cache, saving 0.57g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.59g)
First visit
2132 KB
Repeat visit
57 KB
97% reduction on repeat visits
Saving 0.57g CO2 per returning visitor
76 resources served from cache · 1 resources re-downloaded
Image Optimization12 images, 0 KB total, 0 KB wastedINFO
Image Optimization
12 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
12
Total Size
0 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.