https://msmgraphs.org
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
81
GRADE
B
FIX
1
REVIEW
2
PASS
4
INFO
1
Checks
84 PASS 2 REVIEW 1 FIX
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
CWeb Font Weight VariantsAction18 font weights loaded across 1 famil(y/ies)REVIEW
Web Font Weight Variants
Action18 font weights loaded across 1 famil(y/ies)
18 font weights loaded across 1 famil(y/ies)
Warning::
18 font weights loaded -- likely 100+ KB of unused payload
Loading 18 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: Roboto Slab.
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
ACO2 Per Page Load0.27g CO2 per viewPASS
CO2 Per Page Load
0.27g CO2 per view
0.27g CO2 per view
Info::
0.27g CO2 per page view
This page transfers 0.9 MB, producing an estimated 0.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.05g, end-user device 0.17g.
Got: 0.27g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 32.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 32.1 kg of CO2 annually — equivalent to charging 4014 smartphones.
0.27g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 84% of websites
Sustainable Web Design model v4 · Page size: 0.9 MB
Your site
0.27g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.05g
Network
0.05g
End-user device
0.17g
At 10,000 monthly views: Monthly: 2.7 kg · Annual: 32.1 kg · ≈ 4014 smartphone charges
A+Repeat Visit Weight93% cachedPASS
Repeat Visit Weight
93% cached
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 69 KB (vs 967 KB first visit). 60 of 61 resources are served from browser cache, saving 0.25g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.27g)
First visit
967 KB
Repeat visit
69 KB
93% reduction on repeat visits
Saving 0.25g CO2 per returning visitor
60 resources served from cache · 1 resources re-downloaded
ACarbon Budget16th percentilePASS
Carbon Budget
16th percentile
16th percentile
Info::
0.27g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 84% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 16th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.27g
16th percentile
Cleaner than 84% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 55% cleaner ✓
vs Target 46% cleaner ✓
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 72 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 72 KB (8% of page weight)
Unused JS 72 KB
0.02g unnecessary CO2 per visit
Actual transfer 967 KB
Theoretical minimum 895 KB
Potential savings 72 KB (0.02g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization30 images, 610 KB total, 30 KB wastedINFO
Image Optimization
30 images, 610 KB total, 30 KB wasted
Image Optimization Audit
Total Images
30
Total Size
610 KB
Oversized
1
Wasted
30 KB
16 missing dimensions 10 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.