https://fadr.com/remix/6a7d59b94d98eba9a4f6f59f
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
2
REVIEW
4
PASS
1
INFO
1
Checks
81 PASS 4 REVIEW 2 FIX
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::
0.79g 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
0.79g
55th percentile
Cleaner than 45% of websites
✗ Above the median website
vs Median 32% more
vs Target 58% more
BCO2 Per Page Load0.79g CO2 per viewREVIEW
CO2 Per Page Load
0.79g CO2 per view
0.79g CO2 per view
Info::
0.79g CO2 per page view
This page transfers 2.8 MB, producing an estimated 0.79g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.15g, network 0.14g, end-user device 0.51g.
Got: 0.79g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 95.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 95.0 kg of CO2 annually — equivalent to charging 11869 smartphones.
0.79g
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
0.79g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.15g
Network
0.14g
End-user device
0.51g
At 10,000 monthly views: Monthly: 7.9 kg · Annual: 95.0 kg · ≈ 11869 smartphone charges
CTransfer EfficiencyAction63% efficientREVIEW
Transfer Efficiency
Action63% efficient
63% efficient
Warning::
Transfer efficiency: 63%
An estimated 1064 KB (37%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1064 KB of unused JavaScript. This wasted data produces 0.29g of unnecessary CO2 per page view.
Total waste: 1064 KB (37% of page weight)
Unused JS 1064 KB
0.29g unnecessary CO2 per visit
Actual transfer 2861 KB
Theoretical minimum 1797 KB
Potential savings 1064 KB (0.29g 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 62 KB (vs 2861 KB first visit). 142 of 145 resources are served from browser cache, saving 0.77g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.79g)
First visit
2861 KB
Repeat visit
62 KB
98% reduction on repeat visits
Saving 0.77g CO2 per returning visitor
142 resources served from cache · 3 resources re-downloaded
Image Optimization18 images, 37 KB total, 0 KB wastedINFO
Image Optimization
18 images, 37 KB total, 0 KB wasted
Image Optimization Audit
Total Images
18
Total Size
37 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.