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

4 PASS 2 FIX

CO2 Per Page Load

Action

2.69g CO2 per view

FIX

2.69g CO2 per view

2.69g CO2 per page view

This page transfers 11.4 MB, producing an estimated 2.69g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.07g, network 0.56g, end-user device 2.07g.

Got: 2.69g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 323.1 kg CO2/year

With 10,000 page views per month, this page would generate approximately 323.1 kg of CO2 annually — equivalent to charging 40385 smartphones.

Green hosting reduces data center emissions

2.69g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 11.4 MB

Your site

2.69g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.07g

Network

0.56g

End-user device

2.07g

At 10,000 monthly views: Monthly: 26.9 kg · Annual: 323.1 kg · ≈ 40385 smartphone charges

Carbon Budget

Action

95th percentile

FIX

95th percentile

2.69g CO2 — above the median website (0.60g)

Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 95th percentile

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

Top 10%

Target

Median website

2.69g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 349% more

vs Target 438% more

A+

Green Hosting

Green (both)

PASS

Green (both)

Both hosting and CDN use renewable energy

Got: Hosting: Next.js, CDN: Cloudflare

Next.js: 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 Next.js✓CDN Cloudflare✓

Next.js: 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 77 KB (vs 11648 KB first visit). 229 of 231 resources are served from browser cache, saving 2.67g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 2.69g)

First visit

11648 KB

Repeat visit

77 KB

99% reduction on repeat visits

Saving 2.67g CO2 per returning visitor

229 resources served from cache · 2 resources re-downloaded

A+

Transfer Efficiency

91% efficient

PASS

91% efficient

Transfer efficiency: 91%

Only 998 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 998 KB (9% of page weight)

Unused JS 998 KB

0.23g unnecessary CO2 per visit

Actual transfer 11648 KB

Theoretical minimum 10649 KB

Potential savings 998 KB (0.23g CO2)

See Deep Analysis sections above for specific optimizations.

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.