https://aro.tech
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
64
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction3.04g CO2 per viewFIX
CO2 Per Page Load
Action3.04g CO2 per view
3.04g CO2 per view
Critical::
3.04g CO2 per page view
This page transfers 10.7 MB, producing an estimated 3.04g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.56g, network 0.52g, end-user device 1.95g.
Got: 3.04g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 364.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 364.2 kg of CO2 annually — equivalent to charging 45530 smartphones.
3.04g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 10.7 MB
Your site
3.04g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.56g
Network
0.52g
End-user device
1.95g
At 10,000 monthly views: Monthly: 30.4 kg · Annual: 364.2 kg · ≈ 45530 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::
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 GoDaddy✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.04g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
3.04g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 406% more
vs Target 507% more
BWeb Font Weight Variants7 font weights loaded across 1 famil(y/ies)REVIEW
Web Font Weight Variants
7 font weights loaded across 1 famil(y/ies)
7 font weights loaded across 1 famil(y/ies)
Info::
7 font weights loaded -- review whether all are used
5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Albert Sans.
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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 38 KB (vs 10975 KB first visit). 137 of 139 resources are served from browser cache, saving 3.02g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 3.04g)
First visit
10975 KB
Repeat visit
38 KB
100% reduction on repeat visits
Saving 3.02g CO2 per returning visitor
137 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 593 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 593 KB (5% of page weight)
Unused JS 593 KB
0.16g unnecessary CO2 per visit
Actual transfer 10975 KB
Theoretical minimum 10381 KB
Potential savings 593 KB (0.16g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization46 images, 501 KB total, 296 KB wastedINFO
Image Optimization
46 images, 501 KB total, 296 KB wasted
Image Optimization Audit
Total Images
46
Total Size
501 KB
Oversized
23
Wasted
296 KB
27 missing alt text 46 missing dimensions 42 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.