https://aoa-togo.org
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
75
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction1.65g CO2 per viewFIX
CO2 Per Page Load
Action1.65g CO2 per view
1.65g CO2 per view
Warning::
1.65g CO2 per page view
This page transfers 7.0 MB, producing an estimated 1.65g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.34g, end-user device 1.26g.
Got: 1.65g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 197.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 197.5 kg of CO2 annually — equivalent to charging 24685 smartphones.
Info::
Green hosting reduces data center emissions
1.65g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 21% of websites
Sustainable Web Design model v4 · Page size: 7.0 MB
Your site
1.65g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.34g
End-user device
1.26g
At 10,000 monthly views: Monthly: 16.5 kg · Annual: 197.5 kg · ≈ 24685 smartphone charges
FCarbon BudgetAction79th percentileFIX
Carbon Budget
Action79th percentile
79th percentile
Warning::
1.65g CO2 — above the median website (0.60g)
Heavier than an estimated 21% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 79th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.65g
79th percentile
Cleaner than 21% of websites
✗ Above the median website
vs Median 174% more
vs Target 229% more
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+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Vercel, CDN: Vercel
Info::
Vercel: Hosted on AWS/Google Cloud with renewable energy commitments
Info::
Vercel: Hosted on AWS/Google Cloud with 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 Hosting✓ Green Hosted
Hosting Vercel✓CDN Vercel✓
Vercel: Hosted on AWS/Google Cloud with renewable energy commitments
Vercel: Hosted on AWS/Google Cloud with renewable energy commitments
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 1 KB (vs 7119 KB first visit). 32 of 33 resources are served from browser cache, saving 1.65g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.65g)
First visit
7119 KB
Repeat visit
1 KB
100% reduction on repeat visits
Saving 1.65g CO2 per returning visitor
32 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency91% efficientPASS
Transfer Efficiency
91% efficient
91% efficient
Info::
Transfer efficiency: 91%
Only 674 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 674 KB (9% of page weight)
Unused JS 674 KB
0.16g unnecessary CO2 per visit
Actual transfer 7119 KB
Theoretical minimum 6444 KB
Potential savings 674 KB (0.16g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization10 images, 15910 KB total, 5814 KB wastedINFO
Image Optimization
10 images, 15910 KB total, 5814 KB wasted
Image Optimization Audit
Total Images
10
Total Size
15910 KB
Oversized
8
Wasted
5814 KB
10 missing dimensions 8 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.