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

1.17g CO2 per view

FIX

1.17g CO2 per view

1.17g CO2 per page view

This page transfers 5.0 MB, producing an estimated 1.17g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.24g, end-user device 0.90g.

Got: 1.17g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 140.9 kg CO2/year

With 10,000 page views per month, this page would generate approximately 140.9 kg of CO2 annually — equivalent to charging 17613 smartphones.

Green hosting reduces data center emissions

1.17g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 34% of websites

Sustainable Web Design model v4 · Page size: 5.0 MB

Your site

1.17g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.24g

End-user device

0.90g

At 10,000 monthly views: Monthly: 11.7 kg · Annual: 140.9 kg · ≈ 17613 smartphone charges

Carbon Budget

Action

66th percentile

FIX

66th percentile

1.17g CO2 — above the median website (0.60g)

Heavier than an estimated 34% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 66th percentile

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

Top 10%

Target

Median website

1.17g

66th percentile

Cleaner than 34% of websites

✗ Above the median website

vs Median 96% more

vs Target 135% more

Transfer Efficiency

75% efficient

REVIEW

75% efficient

Transfer efficiency: 75%

An estimated 1250 KB (25%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1250 KB of unused JavaScript. This wasted data produces 0.29g of unnecessary CO2 per page view.

Total waste: 1250 KB (25% of page weight)

Unused JS 1250 KB

0.29g unnecessary CO2 per visit

Actual transfer 5080 KB

Theoretical minimum 3829 KB

Potential savings 1250 KB (0.29g 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 41 KB (vs 5080 KB first visit). 111 of 112 resources are served from browser cache, saving 1.16g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 1.17g)

First visit

5080 KB

Repeat visit

41 KB

99% reduction on repeat visits

Saving 1.16g CO2 per returning visitor

111 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.