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 3 REVIEW

CO2 Per Page Load

0.60g CO2 per view

REVIEW

0.60g CO2 per view

0.60g CO2 per page view

This page transfers 2.5 MB, producing an estimated 0.60g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.12g, end-user device 0.46g.

Got: 0.60g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 71.6 kg CO2/year

With 10,000 page views per month, this page would generate approximately 71.6 kg of CO2 annually — equivalent to charging 8945 smartphones.

Green hosting reduces data center emissions

0.60g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 51% of websites

Sustainable Web Design model v4 · Page size: 2.5 MB

Your site

0.60g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.12g

End-user device

0.46g

At 10,000 monthly views: Monthly: 6.0 kg · Annual: 71.6 kg · ≈ 8945 smartphone charges

Carbon Budget

49th percentile

REVIEW

49th percentile

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

Better than an estimated 51% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.

Estimated 49th percentile

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

Top 10%

Target

Median website

0.60g

49th percentile

Cleaner than 51% of websites

✗ Above the median website

vs Median 1% cleaner ✓

vs Target 19% more

Transfer Efficiency

Action

68% efficient

REVIEW

68% efficient

Transfer efficiency: 68%

An estimated 821 KB (32%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 821 KB of unused JavaScript. This wasted data produces 0.19g of unnecessary CO2 per page view.

Total waste: 821 KB (32% of page weight)

Unused JS 821 KB

0.19g unnecessary CO2 per visit

Actual transfer 2579 KB

Theoretical minimum 1758 KB

Potential savings 821 KB (0.19g 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

99% cached

PASS

99% cached

99% reduction on repeat visits

Returning visitors download only 28 KB (vs 2579 KB first visit). 110 of 111 resources are served from browser cache, saving 0.59g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.60g)

First visit

2579 KB

Repeat visit

28 KB

99% reduction on repeat visits

Saving 0.59g CO2 per returning visitor

110 resources served from cache · 1 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.