https://www.dentistwandsworth.co.uk/composite-bonding

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Device:

Mobile Desktop

Checks

4 PASS 3 REVIEW

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Hetzner Online GmbH uses renewable energy

Hetzner Online GmbH: Verified by the Green Web Foundation

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

Carbon Budget

35th percentile

REVIEW

35th percentile

0.45g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 65% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 35th percentile

Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

Top 10%

Target

Median website

0.45g

35th percentile

Cleaner than 65% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 24% cleaner ✓

vs Target 9% cleaner ✓

Transfer Efficiency

Action

71% efficient

REVIEW

71% efficient

Transfer efficiency: 71%

An estimated 569 KB (29%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 569 KB of unused JavaScript. This wasted data produces 0.13g of unnecessary CO2 per page view.

Total waste: 569 KB (29% of page weight)

Unused JS 569 KB

0.13g unnecessary CO2 per visit

Actual transfer 1965 KB

Theoretical minimum 1396 KB

Potential savings 569 KB (0.13g CO2)

See Deep Analysis sections above for specific optimizations.

CO2 Per Page Load

0.45g CO2 per view

PASS

0.45g CO2 per view

0.45g CO2 per page view

This page transfers 1.9 MB, producing an estimated 0.45g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.35g.

Got: 0.45g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 54.5 kg CO2/year

With 10,000 page views per month, this page would generate approximately 54.5 kg of CO2 annually — equivalent to charging 6816 smartphones.

Green hosting reduces data center emissions

0.45g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 65% of websites

Sustainable Web Design model v4 · Page size: 1.9 MB

Your site

0.45g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.09g

End-user device

0.35g

At 10,000 monthly views: Monthly: 4.5 kg · Annual: 54.5 kg · ≈ 6816 smartphone charges

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 39 KB (vs 1965 KB first visit). 74 of 76 resources are served from browser cache, saving 0.45g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.45g)

First visit

1965 KB

Repeat visit

39 KB

98% reduction on repeat visits

Saving 0.45g CO2 per returning visitor

74 resources served from cache · 2 resources re-downloaded

A+

Web Font Weight Variants

3 font weights loaded across 2 famil(y/ies) -- reasonable

PASS

3 font weights loaded across 2 famil(y/ies) -- reasonable

3 font weight(s) loaded across 2 famil(y/ies)

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Image Optimization

31 images, 558 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

558 KB

22 missing dimensions 25 missing lazy loading

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.