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
88
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 EfficiencyAction64% efficientREVIEW
Transfer Efficiency
Action64% efficient
64% efficient
Warning::
Transfer efficiency: 64%
An estimated 338 KB (36%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 338 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
Total waste: 338 KB (36% of page weight)
Unused JS 338 KB
0.08g unnecessary CO2 per visit
Actual transfer 937 KB
Theoretical minimum 598 KB
Potential savings 338 KB (0.08g CO2)
See Deep Analysis sections above for specific optimizations.
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.
ACO2 Per Page Load0.22g CO2 per viewPASS
CO2 Per Page Load
0.22g CO2 per view
0.22g CO2 per view
Info::
0.22g CO2 per page view
This page transfers 0.9 MB, producing an estimated 0.22g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.04g, end-user device 0.17g.
Got: 0.22g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 26.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 26.0 kg of CO2 annually — equivalent to charging 3249 smartphones.
Info::
Green hosting reduces data center emissions
0.22g
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
0.22g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.04g
End-user device
0.17g
At 10,000 monthly views: Monthly: 2.2 kg · Annual: 26.0 kg · ≈ 3249 smartphone charges
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 58 KB (vs 937 KB first visit). 65 of 70 resources are served from browser cache, saving 0.20g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.22g)
First visit
937 KB
Repeat visit
58 KB
94% reduction on repeat visits
Saving 0.20g CO2 per returning visitor
65 resources served from cache · 5 resources re-downloaded
ACarbon Budget11th percentilePASS
Carbon Budget
11th percentile
11th percentile
Info::
0.22g 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
0.22g
11th percentile
Cleaner than 89% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 64% cleaner ✓
vs Target 57% 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 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.