https://www.murci.co.uk
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
66
GRADE
D
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction4.89g CO2 per viewFIX
CO2 Per Page Load
Action4.89g CO2 per view
4.89g CO2 per view
Critical::
4.89g CO2 per page view
This page transfers 20.7 MB, producing an estimated 4.89g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.12g, network 1.01g, end-user device 3.76g.
Got: 4.89g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 587.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 587.4 kg of CO2 annually — equivalent to charging 73421 smartphones.
Info::
Green hosting reduces data center emissions
4.89g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 20.7 MB
Your site
4.89g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.12g
Network
1.01g
End-user device
3.76g
At 10,000 monthly views: Monthly: 48.9 kg · Annual: 587.4 kg · ≈ 73421 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
4.89g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
4.89g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 716% more
vs Target 879% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Cloudflare uses renewable energy
Info::
Cloudflare: 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 Cloudflare✓CDN Shopify✗
Cloudflare: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
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.
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 93 KB (vs 21176 KB first visit). 336 of 338 resources are served from browser cache, saving 4.87g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 4.89g)
First visit
21176 KB
Repeat visit
93 KB
100% reduction on repeat visits
Saving 4.87g CO2 per returning visitor
336 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 283 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 283 KB (1% of page weight)
Unused JS 283 KB
0.07g unnecessary CO2 per visit
Actual transfer 21176 KB
Theoretical minimum 20892 KB
Potential savings 283 KB (0.07g 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: Cloudflare
Image Optimization62 images, 1661 KB total, 0 KB wastedINFO
Image Optimization
62 images, 1661 KB total, 0 KB wasted
Image Optimization Audit
Total Images
62
Total Size
1661 KB
Oversized
1
4 missing alt text 26 missing dimensions 28 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.