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

1.07g CO2 per view

FIX

1.07g CO2 per view

1.07g CO2 per page view

This page transfers 4.5 MB, producing an estimated 1.07g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.22g, end-user device 0.83g.

Got: 1.07g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 129.0 kg CO2/year

With 10,000 page views per month, this page would generate approximately 129.0 kg of CO2 annually — equivalent to charging 16121 smartphones.

Green hosting reduces data center emissions

1.07g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 37% of websites

Sustainable Web Design model v4 · Page size: 4.5 MB

Your site

1.07g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.22g

End-user device

0.83g

At 10,000 monthly views: Monthly: 10.7 kg · Annual: 129.0 kg · ≈ 16121 smartphone charges

Carbon Budget

Action

63th percentile

FIX

63th percentile

1.07g CO2 — above the median website (0.60g)

Heavier than an estimated 37% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 63th percentile

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

Top 10%

Target

Median website

1.07g

63rd percentile

Cleaner than 37% of websites

✗ Above the median website

vs Median 79% more

vs Target 115% more

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Aruba.it uses renewable energy

Aruba.it: 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 Aruba.it✓CDN Not identified✗

Aruba.it: 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 18 KB (vs 4649 KB first visit). 73 of 74 resources are served from browser cache, saving 1.07g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 1.07g)

First visit

4649 KB

Repeat visit

18 KB

100% reduction on repeat visits

Saving 1.07g CO2 per returning visitor

73 resources served from cache · 1 resources re-downloaded

A+

Transfer Efficiency

98% efficient

PASS

98% efficient

Transfer efficiency: 98%

Only 70 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 70 KB (2% of page weight)

Unused JS 70 KB

0.02g unnecessary CO2 per visit

Actual transfer 4649 KB

Theoretical minimum 4578 KB

Potential savings 70 KB (0.02g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Web Font Weight Variants

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

PASS

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

1 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: Aruba.it

Image Optimization

35 images, 4023 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

4023 KB

Oversized

21 missing dimensions 26 missing lazy loading

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