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 1 REVIEW 2 FIX

CO2 Per Page Load

Action

1.13g CO2 per view

FIX

1.13g CO2 per view

1.13g CO2 per page view

This page transfers 4.8 MB, producing an estimated 1.13g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.23g, end-user device 0.87g.

Got: 1.13g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 135.3 kg CO2/year

With 10,000 page views per month, this page would generate approximately 135.3 kg of CO2 annually — equivalent to charging 16910 smartphones.

Green hosting reduces data center emissions

1.13g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 35% of websites

Sustainable Web Design model v4 · Page size: 4.8 MB

Your site

1.13g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.23g

End-user device

0.87g

At 10,000 monthly views: Monthly: 11.3 kg · Annual: 135.3 kg · ≈ 16910 smartphone charges

Carbon Budget

Action

65th percentile

FIX

65th percentile

1.13g CO2 — above the median website (0.60g)

Heavier than an estimated 35% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 65th percentile

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

Top 10%

Target

Median website

1.13g

65th percentile

Cleaner than 35% of websites

✗ Above the median website

vs Median 88% more

vs Target 125% more

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Apache HTTP Server uses renewable energy

Apache HTTP Server: 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 Apache HTTP Server✓CDN Not identified✗

Apache HTTP Server: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 16 KB (vs 4877 KB first visit). 79 of 80 resources are served from browser cache, saving 1.12g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 1.13g)

First visit

4877 KB

Repeat visit

16 KB

100% reduction on repeat visits

Saving 1.12g CO2 per returning visitor

79 resources served from cache · 1 resources re-downloaded

A+

Transfer Efficiency

97% efficient

PASS

97% efficient

Transfer efficiency: 97%

Only 161 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 161 KB (3% of page weight)

Unused JS 161 KB

0.04g unnecessary CO2 per visit

Actual transfer 4877 KB

Theoretical minimum 4716 KB

Potential savings 161 KB (0.04g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Web Font Weight Variants

3 font weights loaded across 1 famil(y/ies) -- reasonable

PASS

3 font weights loaded across 1 famil(y/ies) -- reasonable

3 font weight(s) loaded across 1 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: Transip

Image Optimization

30 images, 3527 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

3527 KB

30 missing alt text 30 missing dimensions 27 missing lazy loading

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