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
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 BudgetAction53th percentileFIX
Carbon Budget
Action53th percentile
53th percentile
Warning::
0.71g CO2 — above the median website (0.60g)
Heavier than an estimated 47% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 53th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.71g
53rd percentile
Cleaner than 47% of websites
✗ Above the median website
vs Median 18% more
vs Target 42% more
BCO2 Per Page Load0.71g CO2 per viewREVIEW
CO2 Per Page Load
0.71g CO2 per view
0.71g CO2 per view
Info::
0.71g CO2 per page view
This page transfers 2.5 MB, producing an estimated 0.71g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.13g, network 0.12g, end-user device 0.46g.
Got: 0.71g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 85.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 85.3 kg of CO2 annually — equivalent to charging 10662 smartphones.
0.71g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 47% of websites
Sustainable Web Design model v4 · Page size: 2.5 MB
Your site
0.71g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.13g
Network
0.12g
End-user device
0.46g
At 10,000 monthly views: Monthly: 7.1 kg · Annual: 85.3 kg · ≈ 10662 smartphone charges
BTransfer Efficiency88% efficientREVIEW
Transfer Efficiency
88% efficient
88% efficient
Info::
Transfer efficiency: 88%
An estimated 304 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 304 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
Total waste: 304 KB (12% of page weight)
Unused JS 304 KB
0.08g unnecessary CO2 per visit
Actual transfer 2570 KB
Theoretical minimum 2265 KB
Potential savings 304 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 57 KB (vs 2570 KB first visit). 64 of 65 resources are served from browser cache, saving 0.69g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.71g)
First visit
2570 KB
Repeat visit
57 KB
98% reduction on repeat visits
Saving 0.69g CO2 per returning visitor
64 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.