https://enel.it
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
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
DCO2 Per Page LoadAction1.16g CO2 per viewFIX
CO2 Per Page Load
Action1.16g CO2 per view
1.16g CO2 per view
Warning::
1.16g CO2 per page view
This page transfers 4.1 MB, producing an estimated 1.16g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.22g, network 0.20g, end-user device 0.75g.
Got: 1.16g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 139.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 139.6 kg of CO2 annually — equivalent to charging 17453 smartphones.
1.16g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 34% of websites
Sustainable Web Design model v4 · Page size: 4.1 MB
Your site
1.16g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.22g
Network
0.20g
End-user device
0.75g
At 10,000 monthly views: Monthly: 11.6 kg · Annual: 139.6 kg · ≈ 17453 smartphone charges
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 BudgetAction66th percentileFIX
Carbon Budget
Action66th percentile
66th percentile
Warning::
1.16g CO2 — above the median website (0.60g)
Heavier than an estimated 34% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 66th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.16g
66th percentile
Cleaner than 34% of websites
✗ Above the median website
vs Median 94% more
vs Target 133% more
BTransfer Efficiency76% efficientREVIEW
Transfer Efficiency
76% efficient
76% efficient
Info::
Transfer efficiency: 76%
An estimated 992 KB (24%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 992 KB of unused JavaScript. This wasted data produces 0.27g of unnecessary CO2 per page view.
Total waste: 992 KB (24% of page weight)
Unused JS 992 KB
0.27g unnecessary CO2 per visit
Actual transfer 4207 KB
Theoretical minimum 3214 KB
Potential savings 992 KB (0.27g 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 Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 151 KB (vs 4207 KB first visit). 228 of 230 resources are served from browser cache, saving 1.12g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 1.16g)
First visit
4207 KB
Repeat visit
151 KB
96% reduction on repeat visits
Saving 1.12g CO2 per returning visitor
228 resources served from cache · 2 resources re-downloaded
Image Optimization200 images, 1119 KB total, 234 KB wastedINFO
Image Optimization
200 images, 1119 KB total, 234 KB wasted
Image Optimization Audit
Total Images
200
Total Size
1119 KB
Oversized
6
Wasted
234 KB
61 missing alt text 194 missing dimensions 91 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.