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

3 PASS 4 REVIEW

CO2 Per Page Load

0.62g CO2 per view

REVIEW

0.62g CO2 per view

0.62g CO2 per page view

This page transfers 2.6 MB, producing an estimated 0.62g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.47g.

Got: 0.62g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 74.0 kg CO2/year

With 10,000 page views per month, this page would generate approximately 74.0 kg of CO2 annually — equivalent to charging 9251 smartphones.

Green hosting reduces data center emissions

0.62g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 50% of websites

Sustainable Web Design model v4 · Page size: 2.6 MB

Your site

0.62g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.02g

Network

0.13g

End-user device

0.47g

At 10,000 monthly views: Monthly: 6.2 kg · Annual: 74.0 kg · ≈ 9251 smartphone charges

Carbon Budget

50th percentile

REVIEW

50th percentile

0.62g CO2 — above the median website (0.60g)

Heavier than an estimated 50% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 50th percentile

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

Top 10%

Target

Median website

0.62g

50th percentile

Cleaner than 50% of websites

✗ Above the median website

vs Median 3% more

vs Target 23% more

Web Font Weight Variants

6 font weights loaded across 2 famil(y/ies)

REVIEW

6 font weights loaded across 2 famil(y/ies)

6 font weights loaded -- review whether all are used

5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Cormorant Garamond, DM Sans.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

Green Hosting

Green (cdn)

PASS

Green (cdn)

Netlify CDN uses renewable energy

Since most traffic is served through the CDN, the majority of data transfer energy is renewable.

Netlify: Hosted on AWS/Google Cloud with renewable energy matching

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 Not identified✗CDN Netlify✓

Netlify: Hosted on AWS/Google Cloud with renewable energy matching

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 5 KB (vs 2668 KB first visit). 18 of 19 resources are served from browser cache, saving 0.62g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.62g)

First visit

2668 KB

Repeat visit

5 KB

100% reduction on repeat visits

Saving 0.62g CO2 per returning visitor

18 resources served from cache · 1 resources re-downloaded

A+

Transfer Efficiency

100% efficient

PASS

100% efficient

Transfer efficiency: 100%

Only 0 KB of potential savings identified. Your page is well-optimized for size.

Actual transfer 2668 KB

Theoretical minimum 2668 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization

14 images, 2613 KB total, 1515 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

2613 KB

Oversized

Wasted

1515 KB

14 missing dimensions 8 missing lazy loading

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