https://www.mybts.fr
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
85
GRADE
B
FIX
0
REVIEW
3
PASS
4
INFO
1
Checks
84 PASS 3 REVIEW
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Apache HTTP Server uses renewable energy
Info::
Apache HTTP Server: 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 Apache HTTP Server✓CDN Not identified✗
Apache HTTP Server: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
CTransfer EfficiencyAction68% efficientREVIEW
Transfer Efficiency
Action68% efficient
68% efficient
Warning::
Transfer efficiency: 68%
An estimated 288 KB (32%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 288 KB of unused JavaScript. This wasted data produces 0.07g of unnecessary CO2 per page view.
Total waste: 288 KB (32% of page weight)
Unused JS 288 KB
0.07g unnecessary CO2 per visit
Actual transfer 913 KB
Theoretical minimum 625 KB
Potential savings 288 KB (0.07g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction23 font weights loaded across 1 famil(y/ies)REVIEW
Web Font Weight Variants
Action23 font weights loaded across 1 famil(y/ies)
23 font weights loaded across 1 famil(y/ies)
Warning::
23 font weights loaded -- likely 100+ KB of unused payload
Loading 23 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Archivo.
ACO2 Per Page Load0.21g CO2 per viewPASS
CO2 Per Page Load
0.21g CO2 per view
0.21g CO2 per view
Info::
0.21g CO2 per page view
This page transfers 0.9 MB, producing an estimated 0.21g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.04g, end-user device 0.16g.
Got: 0.21g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 25.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 25.3 kg of CO2 annually — equivalent to charging 3166 smartphones.
Info::
Green hosting reduces data center emissions
0.21g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 89% of websites
Sustainable Web Design model v4 · Page size: 0.9 MB
Your site
0.21g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.04g
End-user device
0.16g
At 10,000 monthly views: Monthly: 2.1 kg · Annual: 25.3 kg · ≈ 3166 smartphone charges
A+Repeat Visit Weight95% cachedPASS
Repeat Visit Weight
95% cached
95% cached
Info::
95% reduction on repeat visits
Returning visitors download only 47 KB (vs 913 KB first visit). 54 of 55 resources are served from browser cache, saving 0.20g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.21g)
First visit
913 KB
Repeat visit
47 KB
95% reduction on repeat visits
Saving 0.20g CO2 per returning visitor
54 resources served from cache · 1 resources re-downloaded
ACarbon Budget11th percentilePASS
Carbon Budget
11th percentile
11th percentile
Info::
0.21g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 89% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 11th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.21g
11th percentile
Cleaner than 89% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 65% cleaner ✓
vs Target 58% cleaner ✓
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: Infomaniak
Image Optimization21 images, 99 KB total, 0 KB wastedINFO
Image Optimization
21 images, 99 KB total, 0 KB wasted
Image Optimization Audit
Total Images
21
Total Size
99 KB
2 missing dimensions 2 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.