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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
68
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
1.71g CO2 per view
FIX
1.71g CO2 per view
Warning::
1.71g CO2 per page view
This page transfers 7.2 MB, producing an estimated 1.71g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.35g, end-user device 1.31g.
Got: 1.71g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 205.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 205.2 kg of CO2 annually — equivalent to charging 25651 smartphones.
Info::
Green hosting reduces data center emissions

1.71g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 19% of websites

Sustainable Web Design model v4 · Page size: 7.2 MB

Your site
1.71g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.35g
End-user device
1.31g
At 10,000 monthly views: Monthly: 17.1 kg · Annual: 205.2 kg · ≈ 25651 smartphone charges
F
Carbon Budget
Action
81th percentile
FIX
81th percentile
Warning::
1.71g CO2 — above the median website (0.60g)
Heavier than an estimated 19% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 81th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.71g

81st percentile

Cleaner than 19% of websites

✗ Above the median website

vs Median 185% more
vs Target 242% more
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 Cloud✓CDN Not identified✗

Google Cloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 70 KB (vs 7398 KB first visit). 79 of 80 resources are served from browser cache, saving 1.69g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.71g)
First visit
7398 KB
Repeat visit
70 KB

99% reduction on repeat visits

Saving 1.69g CO2 per returning visitor

79 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
98% efficient
PASS
98% efficient
Info::
Transfer efficiency: 98%
Only 173 KB of potential savings identified. Your page is well-optimized for size.
98% efficient

Total waste: 173 KB (2% of page weight)

Unused JS 173 KB

0.04g unnecessary CO2 per visit

Actual transfer 7398 KB
Theoretical minimum 7225 KB
Potential savings 173 KB (0.04g CO2)

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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