https://lancia.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
71
GRADE
C
FIX
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
DCO2 Per Page LoadAction1.04g CO2 per viewFIX
CO2 Per Page Load
Action1.04g CO2 per view
1.04g CO2 per view
Warning::
1.04g CO2 per page view
This page transfers 3.7 MB, producing an estimated 1.04g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.19g, network 0.18g, end-user device 0.67g.
Got: 1.04g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 124.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 124.6 kg of CO2 annually — equivalent to charging 15570 smartphones.
1.04g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 38% of websites
Sustainable Web Design model v4 · Page size: 3.7 MB
Your site
1.04g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.19g
Network
0.18g
End-user device
0.67g
At 10,000 monthly views: Monthly: 10.4 kg · Annual: 124.6 kg · ≈ 15570 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
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::
Akamai: Committed to 50% renewable by 2030
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 Not identified✗CDN Akamai✗
Akamai: Committed to 50% renewable by 2030
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction62th percentileFIX
Carbon Budget
Action62th percentile
62th percentile
Warning::
1.04g CO2 — above the median website (0.60g)
Heavier than an estimated 38% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 62th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.04g
62nd percentile
Cleaner than 38% of websites
✗ Above the median website
vs Median 73% more
vs Target 108% more
BTransfer Efficiency88% efficientREVIEW
Transfer Efficiency
88% efficient
88% efficient
Info::
Transfer efficiency: 88%
An estimated 434 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 434 KB of unused JavaScript. This wasted data produces 0.12g of unnecessary CO2 per page view.
Total waste: 434 KB (12% of page weight)
Unused JS 434 KB
0.12g unnecessary CO2 per visit
Actual transfer 3753 KB
Theoretical minimum 3319 KB
Potential savings 434 KB (0.12g 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 Weight95% cachedPASS
Repeat Visit Weight
95% cached
95% cached
Info::
95% reduction on repeat visits
Returning visitors download only 185 KB (vs 3753 KB first visit). 68 of 70 resources are served from browser cache, saving 0.99g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 1.04g)
First visit
3753 KB
Repeat visit
185 KB
95% reduction on repeat visits
Saving 0.99g CO2 per returning visitor
68 resources served from cache · 2 resources re-downloaded
Image Optimization28 images, 2065 KB total, 18 KB wastedINFO
Image Optimization
28 images, 2065 KB total, 18 KB wasted
Image Optimization Audit
Total Images
28
Total Size
2065 KB
Oversized
1
Wasted
18 KB
14 missing alt text 11 missing dimensions 14 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.