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Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
2
PASS
4
INFO
0
Checks
6
4 PASS 2 REVIEW
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: Verified by the Green Web Foundation
Info::
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 CloudCDN Not identified

Google Cloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Carbon Budget
32th percentile
REVIEW
32th percentile
Info::
0.43g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 68% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 32th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.43g

32nd percentile

Cleaner than 68% of websites

Below the Web Sustainability Guidelines target

vs Median 29% cleaner ✓
vs Target 15% cleaner ✓
A
CO2 Per Page Load
0.43g CO2 per view
PASS
0.43g CO2 per view
Info::
0.43g CO2 per page view
This page transfers 1.8 MB, producing an estimated 0.43g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.33g.
Got: 0.43g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 51.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 51.0 kg of CO2 annually — equivalent to charging 6377 smartphones.
Info::
Green hosting reduces data center emissions

0.43g

Carbon Footprint per page view

Below sustainability target (0.50g)

Cleaner than 68% of websites

Sustainable Web Design model v4 · Page size: 1.8 MB

Your site
0.43g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.01g
Network
0.09g
End-user device
0.33g
At 10,000 monthly views: Monthly: 4.3 kg · Annual: 51.0 kg · ≈ 6377 smartphone charges
A+
Repeat Visit Weight
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 74 KB (vs 1839 KB first visit). 57 of 58 resources are served from browser cache, saving 0.41g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.43g)
First visit
1839 KB
Repeat visit
74 KB

96% reduction on repeat visits

Saving 0.41g CO2 per returning visitor

57 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
100% efficient
PASS
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
100% efficient
Actual transfer 1839 KB
Theoretical minimum 1839 KB

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: Google Cloud

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

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