Sustainability

· 8 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

5 PASS 2 FIX

CO2 Per Page Load

Action

8.68g CO2 per view

FIX

8.68g CO2 per view

8.68g CO2 per page view

This page transfers 36.7 MB, producing an estimated 8.68g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.22g, network 1.79g, end-user device 6.66g.

Got: 8.68g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 1041.0 kg CO2/year

With 10,000 page views per month, this page would generate approximately 1041.0 kg of CO2 annually — equivalent to charging 130127 smartphones.

Green hosting reduces data center emissions

8.68g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 36.7 MB

Your site

8.68g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.22g

Network

1.79g

End-user device

6.66g

At 10,000 monthly views: Monthly: 86.8 kg · Annual: 1041.0 kg · ≈ 130127 smartphone charges

Carbon Budget

Action

95th percentile

FIX

95th percentile

8.68g 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

8.68g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 1346% more

vs Target 1635% more

A+

Green Hosting

Green (both)

PASS

Green (both)

Both hosting and CDN use renewable energy

Got: Hosting: Amazon Web Services, CDN: Cloudflare

Amazon Web Services: 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 Amazon Web Services✓CDN Cloudflare✓

Amazon Web Services: 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

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 90 KB (vs 37532 KB first visit). 548 of 556 resources are served from browser cache, saving 8.65g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 8.68g)

First visit

37532 KB

Repeat visit

90 KB

100% reduction on repeat visits

Saving 8.65g CO2 per returning visitor

548 resources served from cache · 8 resources re-downloaded

A+

Transfer Efficiency

95% efficient

PASS

95% efficient

Transfer efficiency: 95%

Only 1807 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 1807 KB (5% of page weight)

Unused JS 1807 KB

0.42g unnecessary CO2 per visit

Actual transfer 37532 KB

Theoretical minimum 35724 KB

Potential savings 1807 KB (0.42g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Web Font Weight Variants

4 font weights loaded across 1 famil(y/ies) -- reasonable

PASS

4 font weights loaded across 1 famil(y/ies) -- reasonable

4 font weight(s) loaded across 1 famil(y/ies)

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

Image Optimization

110 images, 538 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

110

Total Size

538 KB

Oversized

109 missing dimensions 103 missing lazy loading

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