https://www.chatfieldbraces.co.uk/invisalign-cost-uk/
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
77
GRADE
C
FIX
0
REVIEW
4
PASS
3
INFO
1
Checks
83 PASS 4 REVIEW
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Hetzner Online GmbH uses renewable energy
Info::
Hetzner Online GmbH: 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 Hetzner Online GmbH✓CDN Not identified✗
Hetzner Online GmbH: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCarbon Budget37th percentileREVIEW
Carbon Budget
37th percentile
37th percentile
Info::
0.48g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 63% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 37th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.48g
37th percentile
Cleaner than 63% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 20% cleaner ✓
vs Target 4% cleaner ✓
CTransfer EfficiencyAction64% efficientREVIEW
Transfer Efficiency
Action64% efficient
64% efficient
Warning::
Transfer efficiency: 64%
An estimated 740 KB (36%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 740 KB of unused JavaScript. This wasted data produces 0.17g of unnecessary CO2 per page view.
Total waste: 740 KB (36% of page weight)
Unused JS 740 KB
0.17g unnecessary CO2 per visit
Actual transfer 2074 KB
Theoretical minimum 1334 KB
Potential savings 740 KB (0.17g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction9 font weights loaded across 1 famil(y/ies)REVIEW
Web Font Weight Variants
Action9 font weights loaded across 1 famil(y/ies)
9 font weights loaded across 1 famil(y/ies)
Warning::
9 font weights loaded -- likely 100+ KB of unused payload
Loading 9 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: Poppins.
ACO2 Per Page Load0.48g CO2 per viewPASS
CO2 Per Page Load
0.48g CO2 per view
0.48g CO2 per view
Info::
0.48g CO2 per page view
This page transfers 2.0 MB, producing an estimated 0.48g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.10g, end-user device 0.37g.
Got: 0.48g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 57.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 57.6 kg of CO2 annually — equivalent to charging 7193 smartphones.
Info::
Green hosting reduces data center emissions
0.48g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 63% of websites
Sustainable Web Design model v4 · Page size: 2.0 MB
Your site
0.48g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.10g
End-user device
0.37g
At 10,000 monthly views: Monthly: 4.8 kg · Annual: 57.6 kg · ≈ 7193 smartphone charges
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 41 KB (vs 2074 KB first visit). 87 of 89 resources are served from browser cache, saving 0.47g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.48g)
First visit
2074 KB
Repeat visit
41 KB
98% reduction on repeat visits
Saving 0.47g CO2 per returning visitor
87 resources served from cache · 2 resources re-downloaded
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: Hetzner Online GmbH
Image Optimization58 images, 288 KB total, 116 KB wastedINFO
Image Optimization
58 images, 288 KB total, 116 KB wasted
Image Optimization Audit
Total Images
58
Total Size
288 KB
Oversized
1
Wasted
116 KB
58 missing dimensions 49 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.