Sustainability

· 6 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

3 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: 135.4 kg CO2/year

With 10,000 page views per month, this page would generate approximately 135.4 kg of CO2 annually — equivalent to charging 16924 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: 135.4 kg · ≈ 16924 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 126% more

Transfer Efficiency

88% efficient

REVIEW

88% efficient

Transfer efficiency: 88%

An estimated 603 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 603 KB of unused JavaScript. This wasted data produces 0.14g of unnecessary CO2 per page view.

Total waste: 603 KB (12% of page weight)

Unused JS 603 KB

0.14g unnecessary CO2 per visit

Actual transfer 4881 KB

Theoretical minimum 4278 KB

Potential savings 603 KB (0.14g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Green Hosting

Green (both)

PASS

Green (both)

Both hosting and CDN use renewable energy

Got: Hosting: Cloudflare, CDN: Cloudflare

Cloudflare: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

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 Cloudflare✓CDN Cloudflare✓

Cloudflare: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 164 KB (vs 4881 KB first visit). 268 of 275 resources are served from browser cache, saving 1.09g CO2 per repeat visit.

Repeat visit: 0.04g CO2 (first visit: 1.13g)

First visit

4881 KB

Repeat visit

164 KB

97% reduction on repeat visits

Saving 1.09g CO2 per returning visitor

268 resources served from cache · 7 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: Cloudflare

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