https://paginegialle.it
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 LoadAction0.92g CO2 per viewFIX
CO2 Per Page Load
Action0.92g CO2 per view
0.92g CO2 per view
Info::
0.92g CO2 per page view
This page transfers 3.3 MB, producing an estimated 0.92g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.17g, network 0.16g, end-user device 0.59g.
Got: 0.92g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 110.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 110.5 kg of CO2 annually — equivalent to charging 13808 smartphones.
0.92g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 41% of websites
Sustainable Web Design model v4 · Page size: 3.3 MB
Your site
0.92g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.17g
Network
0.16g
End-user device
0.59g
At 10,000 monthly views: Monthly: 9.2 kg · Annual: 110.5 kg · ≈ 13808 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 BudgetAction59th percentileFIX
Carbon Budget
Action59th percentile
59th percentile
Warning::
0.92g CO2 — above the median website (0.60g)
Heavier than an estimated 41% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 59th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.92g
59th percentile
Cleaner than 41% of websites
✗ Above the median website
vs Median 53% more
vs Target 84% more
CTransfer EfficiencyAction72% efficientREVIEW
Transfer Efficiency
Action72% efficient
72% efficient
Warning::
Transfer efficiency: 72%
An estimated 922 KB (28%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 922 KB of unused JavaScript. This wasted data produces 0.26g of unnecessary CO2 per page view.
Total waste: 922 KB (28% of page weight)
Unused JS 922 KB
0.26g unnecessary CO2 per visit
Actual transfer 3328 KB
Theoretical minimum 2405 KB
Potential savings 922 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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 27 KB (vs 3328 KB first visit). 78 of 80 resources are served from browser cache, saving 0.91g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.92g)
First visit
3328 KB
Repeat visit
27 KB
99% reduction on repeat visits
Saving 0.91g CO2 per returning visitor
78 resources served from cache · 2 resources re-downloaded
Image Optimization9 images, 632 KB total, 0 KB wastedINFO
Image Optimization
9 images, 632 KB total, 0 KB wasted
Image Optimization Audit
Total Images
9
Total Size
632 KB
4 missing alt text 9 missing dimensions 9 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.