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

2 PASS 2 REVIEW 2 FIX

CO2 Per Page Load

Action

1.36g CO2 per view

FIX

1.36g CO2 per view

1.36g CO2 per page view

This page transfers 5.8 MB, producing an estimated 1.36g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.28g, end-user device 1.05g.

Got: 1.36g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 163.6 kg CO2/year

With 10,000 page views per month, this page would generate approximately 163.6 kg of CO2 annually — equivalent to charging 20450 smartphones.

Green hosting reduces data center emissions

1.36g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 29% of websites

Sustainable Web Design model v4 · Page size: 5.8 MB

Your site

1.36g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.28g

End-user device

1.05g

At 10,000 monthly views: Monthly: 13.6 kg · Annual: 163.6 kg · ≈ 20450 smartphone charges

Carbon Budget

Action

71th percentile

FIX

71th percentile

1.36g CO2 — above the median website (0.60g)

Heavier than an estimated 29% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 71th percentile

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

Top 10%

Target

Median website

1.36g

71st percentile

Cleaner than 29% of websites

✗ Above the median website

vs Median 127% more

vs Target 173% more

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Google Cloud uses renewable energy

Google Cloud: Verified by the Green Web Foundation

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 Google Cloud✓CDN Varnish✗

Google Cloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Transfer Efficiency

84% efficient

REVIEW

84% efficient

Transfer efficiency: 84%

An estimated 972 KB (16%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 972 KB of unused JavaScript. This wasted data produces 0.22g of unnecessary CO2 per page view.

Total waste: 972 KB (16% of page weight)

Unused JS 972 KB

0.22g unnecessary CO2 per visit

Actual transfer 5898 KB

Theoretical minimum 4925 KB

Potential savings 972 KB (0.22g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Repeat Visit Weight

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 23 KB (vs 5898 KB first visit). 165 of 169 resources are served from browser cache, saving 1.36g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 1.36g)

First visit

5898 KB

Repeat visit

23 KB

100% reduction on repeat visits

Saving 1.36g CO2 per returning visitor

165 resources served from cache · 4 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: Google Cloud

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