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

1.15g CO2 per view

FIX

1.15g CO2 per view

1.15g CO2 per page view

This page transfers 4.9 MB, producing an estimated 1.15g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.24g, end-user device 0.89g.

Got: 1.15g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 138.4 kg CO2/year

With 10,000 page views per month, this page would generate approximately 138.4 kg of CO2 annually — equivalent to charging 17303 smartphones.

Green hosting reduces data center emissions

1.15g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 35% of websites

Sustainable Web Design model v4 · Page size: 4.9 MB

Your site

1.15g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.24g

End-user device

0.89g

At 10,000 monthly views: Monthly: 11.5 kg · Annual: 138.4 kg · ≈ 17303 smartphone charges

Carbon Budget

Action

65th percentile

FIX

65th percentile

1.15g 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

1.15g

65th percentile

Cleaner than 35% of websites

✗ Above the median website

vs Median 92% more

vs Target 131% more

Transfer Efficiency

87% efficient

REVIEW

87% efficient

Transfer efficiency: 87%

An estimated 634 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 634 KB of unused JavaScript. This wasted data produces 0.15g of unnecessary CO2 per page view.

Total waste: 634 KB (13% of page weight)

Unused JS 634 KB

0.15g unnecessary CO2 per visit

Actual transfer 4990 KB

Theoretical minimum 4355 KB

Potential savings 634 KB (0.15g 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

93% cached

PASS

93% cached

93% reduction on repeat visits

Returning visitors download only 371 KB (vs 4990 KB first visit). 459 of 502 resources are served from browser cache, saving 1.07g CO2 per repeat visit.

Repeat visit: 0.09g CO2 (first visit: 1.15g)

First visit

4990 KB

Repeat visit

371 KB

93% reduction on repeat visits

Saving 1.07g CO2 per returning visitor

459 resources served from cache · 43 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.