https://www.ocaml.org
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
84
GRADE
B
FIX
0
REVIEW
3
PASS
3
INFO
0
Checks
63 PASS 3 REVIEW
BCO2 Per Page Load0.54g CO2 per viewREVIEW
CO2 Per Page Load
0.54g CO2 per view
0.54g CO2 per view
Info::
0.54g CO2 per page view
This page transfers 2.3 MB, producing an estimated 0.54g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.11g, end-user device 0.41g.
Got: 0.54g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 64.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 64.4 kg of CO2 annually — equivalent to charging 8052 smartphones.
Info::
Green hosting reduces data center emissions
0.54g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 57% of websites
Sustainable Web Design model v4 · Page size: 2.3 MB
Your site
0.54g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.11g
End-user device
0.41g
At 10,000 monthly views: Monthly: 5.4 kg · Annual: 64.4 kg · ≈ 8052 smartphone charges
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Scaleway uses renewable energy
Info::
Scaleway: Verified by the Green Web Foundation
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 Scaleway✓CDN Not identified✗
Scaleway: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCarbon Budget43th percentileREVIEW
Carbon Budget
43th percentile
43th percentile
Info::
0.54g CO2 — below the median website (0.60g)
Better than an estimated 57% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 43th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.54g
43rd percentile
Cleaner than 57% of websites
✗ Above the median website
vs Median 11% cleaner ✓
vs Target 7% more
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 19 KB (vs 2322 KB first visit). 45 of 46 resources are served from browser cache, saving 0.53g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.54g)
First visit
2322 KB
Repeat visit
19 KB
99% reduction on repeat visits
Saving 0.53g CO2 per returning visitor
45 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 24 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 24 KB (1% of page weight)
Unused JS 24 KB
0.01g unnecessary CO2 per visit
Actual transfer 2322 KB
Theoretical minimum 2297 KB
Potential savings 24 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Scaleway
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.