https://www.mbda-systems.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
75
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction1.61g CO2 per viewFIX
CO2 Per Page Load
Action1.61g CO2 per view
1.61g CO2 per view
Warning::
1.61g CO2 per page view
This page transfers 6.8 MB, producing an estimated 1.61g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.33g, end-user device 1.24g.
Got: 1.61g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 192.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 192.9 kg of CO2 annually — equivalent to charging 24118 smartphones.
Info::
Green hosting reduces data center emissions
1.61g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 22% of websites
Sustainable Web Design model v4 · Page size: 6.8 MB
Your site
1.61g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.33g
End-user device
1.24g
At 10,000 monthly views: Monthly: 16.1 kg · Annual: 192.9 kg · ≈ 24118 smartphone charges
FCarbon BudgetAction78th percentileFIX
Carbon Budget
Action78th percentile
78th percentile
Warning::
1.61g CO2 — above the median website (0.60g)
Heavier than an estimated 22% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 78th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.61g
78th percentile
Cleaner than 22% of websites
✗ Above the median website
vs Median 168% more
vs Target 222% more
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.
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
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight92% cachedPASS
Repeat Visit Weight
92% cached
92% cached
Info::
92% reduction on repeat visits
Returning visitors download only 562 KB (vs 6956 KB first visit). 120 of 121 resources are served from browser cache, saving 1.48g CO2 per repeat visit.
Info::
Repeat visit: 0.13g CO2 (first visit: 1.61g)
First visit
6956 KB
Repeat visit
562 KB
92% reduction on repeat visits
Saving 1.48g CO2 per returning visitor
120 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 544 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 544 KB (8% of page weight)
Unused JS 544 KB
0.13g unnecessary CO2 per visit
Actual transfer 6956 KB
Theoretical minimum 6411 KB
Potential savings 544 KB (0.13g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization72 images, 1131 KB total, 184 KB wastedINFO
Image Optimization
72 images, 1131 KB total, 184 KB wasted
Image Optimization Audit
Total Images
72
Total Size
1131 KB
Oversized
8
Wasted
184 KB
13 missing dimensions 17 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.