https://paginebianche.it
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
68
GRADE
D
FIX
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
DCO2 Per Page LoadAction0.80g CO2 per viewFIX
CO2 Per Page Load
Action0.80g CO2 per view
0.80g CO2 per view
Info::
0.80g CO2 per page view
This page transfers 2.8 MB, producing an estimated 0.80g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.15g, network 0.14g, end-user device 0.52g.
Got: 0.80g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 96.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 96.3 kg of CO2 annually — equivalent to charging 12034 smartphones.
0.80g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 45% of websites
Sustainable Web Design model v4 · Page size: 2.8 MB
Your site
0.80g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.15g
Network
0.14g
End-user device
0.52g
At 10,000 monthly views: Monthly: 8.0 kg · Annual: 96.3 kg · ≈ 12034 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::
AWS: Renewable energy varies by region; committed to 100% by 2025
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 HostingNot Green Hosted
Hosting AWS✗CDN AWS CloudFront✗
AWS: Renewable energy varies by region; committed to 100% by 2025
AWS CloudFront: Renewable varies by edge location
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction55th percentileFIX
Carbon Budget
Action55th percentile
55th percentile
Warning::
0.80g CO2 — above the median website (0.60g)
Heavier than an estimated 45% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 55th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.80g
55th percentile
Cleaner than 45% of websites
✗ Above the median website
vs Median 34% more
vs Target 60% more
CTransfer EfficiencyAction68% efficientREVIEW
Transfer Efficiency
Action68% efficient
68% efficient
Warning::
Transfer efficiency: 68%
An estimated 936 KB (32%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 936 KB of unused JavaScript. This wasted data produces 0.26g of unnecessary CO2 per page view.
Total waste: 936 KB (32% of page weight)
Unused JS 936 KB
0.26g unnecessary CO2 per visit
Actual transfer 2901 KB
Theoretical minimum 1964 KB
Potential savings 936 KB (0.26g 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 70 KB (vs 2901 KB first visit). 81 of 84 resources are served from browser cache, saving 0.78g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.80g)
First visit
2901 KB
Repeat visit
70 KB
98% reduction on repeat visits
Saving 0.78g CO2 per returning visitor
81 resources served from cache · 3 resources re-downloaded
Image Optimization17 images, 0 KB total, 0 KB wastedINFO
Image Optimization
17 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
17
Total Size
0 KB
Oversized
2
2 missing alt text 5 missing dimensions 16 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.