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

2 PASS 5 REVIEW

CO2 Per Page Load

0.50g CO2 per view

REVIEW

0.50g CO2 per view

0.50g CO2 per page view

This page transfers 2.1 MB, producing an estimated 0.50g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.10g, end-user device 0.38g.

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

At 10,000 monthly views: 60.1 kg CO2/year

With 10,000 page views per month, this page would generate approximately 60.1 kg of CO2 annually — equivalent to charging 7511 smartphones.

Green hosting reduces data center emissions

0.50g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 60% of websites

Sustainable Web Design model v4 · Page size: 2.1 MB

Your site

0.50g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.10g

End-user device

0.38g

At 10,000 monthly views: Monthly: 5.0 kg · Annual: 60.1 kg · ≈ 7511 smartphone charges

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

OpenGSE uses renewable energy

OpenGSE: 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 OpenGSE✓CDN Not identified✗

OpenGSE: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

40th percentile

REVIEW

40th percentile

0.50g CO2 — below the median website (0.60g)

Better than an estimated 60% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.

Estimated 40th percentile

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

Top 10%

Target

Median website

0.50g

40th percentile

Cleaner than 60% of websites

✗ Above the median website

vs Median 17% cleaner ✓

vs Target 0% more

Transfer Efficiency

84% efficient

REVIEW

84% efficient

Transfer efficiency: 84%

An estimated 350 KB (16%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 350 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.

Total waste: 350 KB (16% of page weight)

Unused JS 350 KB

0.08g unnecessary CO2 per visit

Actual transfer 2166 KB

Theoretical minimum 1815 KB

Potential savings 350 KB (0.08g CO2)

See Deep Analysis sections above for specific optimizations.

Web Font Weight Variants

Action

23 font weights loaded across 1 famil(y/ies)

REVIEW

23 font weights loaded across 1 famil(y/ies)

23 font weights loaded -- likely 100+ KB of unused payload

Loading 23 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: Archivo.

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 54 KB (vs 2166 KB first visit). 57 of 62 resources are served from browser cache, saving 0.49g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.50g)

First visit

2166 KB

Repeat visit

54 KB

97% reduction on repeat visits

Saving 0.49g CO2 per returning visitor

57 resources served from cache · 5 resources re-downloaded

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Image Optimization

4 images, 4 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

4 KB

4 missing dimensions 2 missing lazy loading

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