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 LoadAction1.98g CO2 per viewFIX
CO2 Per Page Load
Action1.98g CO2 per view
1.98g CO2 per view
Warning::
1.98g CO2 per page view
This page transfers 7.0 MB, producing an estimated 1.98g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.37g, network 0.34g, end-user device 1.27g.
Got: 1.98g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 237.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 237.8 kg of CO2 annually — equivalent to charging 29728 smartphones.
1.98g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 11% of websites
Sustainable Web Design model v4 · Page size: 7.0 MB
Your site
1.98g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.37g
Network
0.34g
End-user device
1.27g
At 10,000 monthly views: Monthly: 19.8 kg · Annual: 237.8 kg · ≈ 29728 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 BudgetAction89th percentileFIX
Carbon Budget
Action89th percentile
89th percentile
Warning::
1.98g CO2 — above the median website (0.60g)
Heavier than an estimated 11% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 89th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.98g
89th percentile
Cleaner than 11% of websites
✗ Above the median website
vs Median 230% more
vs Target 296% 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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 38 KB (vs 7166 KB first visit). 136 of 138 resources are served from browser cache, saving 1.97g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.98g)
First visit
7166 KB
Repeat visit
38 KB
99% reduction on repeat visits
Saving 1.97g CO2 per returning visitor
136 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 592 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 592 KB (8% of page weight)
Unused JS 592 KB
0.16g unnecessary CO2 per visit
Actual transfer 7166 KB
Theoretical minimum 6574 KB
Potential savings 592 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.