https://www.chatfieldbraces.co.uk/orthodontics/invisalign-london/
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
63
GRADE
D
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction23.25g CO2 per viewFIX
CO2 Per Page Load
Action23.25g CO2 per view
23.25g CO2 per view
Critical::
23.25g CO2 per page view
This page transfers 98.2 MB, producing an estimated 23.25g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.58g, network 4.81g, end-user device 17.86g.
Got: 23.25g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 2790.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 2790.4 kg of CO2 annually — equivalent to charging 348803 smartphones.
Info::
Green hosting reduces data center emissions
23.25g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 98.2 MB
Your site
23.25g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.58g
Network
4.81g
End-user device
17.86g
At 10,000 monthly views: Monthly: 232.5 kg · Annual: 2790.4 kg · ≈ 348803 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
23.25g 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
23.25g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 3776% more
vs Target 4551% more
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
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.
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 48 KB (vs 100603 KB first visit). 95 of 97 resources are served from browser cache, saving 23.24g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 23.25g)
First visit
100603 KB
Repeat visit
48 KB
100% reduction on repeat visits
Saving 23.24g CO2 per returning visitor
95 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 751 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 751 KB (1% of page weight)
Unused JS 751 KB
0.17g unnecessary CO2 per visit
Actual transfer 100603 KB
Theoretical minimum 99852 KB
Potential savings 751 KB (0.17g 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: Hetzner Online GmbH
Image Optimization48 images, 99318 KB total, 0 KB wastedINFO
Image Optimization
48 images, 99318 KB total, 0 KB wasted
Image Optimization Audit
Total Images
48
Total Size
99318 KB
48 missing dimensions 39 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.