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 2 REVIEW 2 FIX

CO2 Per Page Load

Action

1.20g CO2 per view

FIX

1.20g CO2 per view

1.20g CO2 per page view

This page transfers 5.1 MB, producing an estimated 1.20g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.25g, end-user device 0.92g.

Got: 1.20g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 143.8 kg CO2/year

With 10,000 page views per month, this page would generate approximately 143.8 kg of CO2 annually — equivalent to charging 17969 smartphones.

Green hosting reduces data center emissions

1.20g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 33% of websites

Sustainable Web Design model v4 · Page size: 5.1 MB

Your site

1.20g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.25g

End-user device

0.92g

At 10,000 monthly views: Monthly: 12.0 kg · Annual: 143.8 kg · ≈ 17969 smartphone charges

Carbon Budget

Action

67th percentile

FIX

67th percentile

1.20g CO2 — above the median website (0.60g)

Heavier than an estimated 33% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 67th percentile

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

Top 10%

Target

Median website

1.20g

67th percentile

Cleaner than 33% of websites

✗ Above the median website

vs Median 100% more

vs Target 140% more

Web Font Weight Variants

5 font weights loaded across 1 famil(y/ies)

REVIEW

5 font weights loaded across 1 famil(y/ies)

5 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: Poppins.

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

99% cached

PASS

99% cached

99% reduction on repeat visits

Returning visitors download only 74 KB (vs 5182 KB first visit). 70 of 72 resources are served from browser cache, saving 1.18g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 1.20g)

First visit

5182 KB

Repeat visit

74 KB

99% reduction on repeat visits

Saving 1.18g CO2 per returning visitor

70 resources served from cache · 2 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 5182 KB

Theoretical minimum 5182 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization

3 images, 517 KB total, 309 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

517 KB

Oversized

Wasted

309 KB

3 missing dimensions 2 missing lazy loading

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