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https://nintendo.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
57
GRADE
D
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.88g CO2 per view
FIX
1.88g CO2 per view
Warning::
1.88g CO2 per page view
This page transfers 6.6 MB, producing an estimated 1.88g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.35g, network 0.32g, end-user device 1.20g.
Got: 1.88g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 225.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 225.0 kg of CO2 annually — equivalent to charging 28130 smartphones.

1.88g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 14% of websites

Sustainable Web Design model v4 · Page size: 6.6 MB

Your site
1.88g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.35g
Network
0.32g
End-user device
1.20g
At 10,000 monthly views: Monthly: 18.8 kg · Annual: 225.0 kg · ≈ 28130 smartphone charges
D
Green Hosting
Action
Not green
FIX
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Apache HTTP Server✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
86th percentile
FIX
86th percentile
Warning::
1.88g CO2 — above the median website (0.60g)
Heavier than an estimated 14% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 86th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.88g

86th percentile

Cleaner than 14% of websites

✗ Above the median website

vs Median 213% more
vs Target 275% more
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
87% cached
PASS
87% cached
Info::
87% reduction on repeat visits
Returning visitors download only 900 KB (vs 6781 KB first visit). 107 of 113 resources are served from browser cache, saving 1.63g CO2 per repeat visit.
Info::
Repeat visit: 0.25g CO2 (first visit: 1.88g)
First visit
6781 KB
Repeat visit
900 KB

87% reduction on repeat visits

Saving 1.63g CO2 per returning visitor

107 resources served from cache · 6 resources re-downloaded

A+
Transfer Efficiency
99% efficient
PASS
99% efficient
Info::
Transfer efficiency: 99%
Only 96 KB of potential savings identified. Your page is well-optimized for size.
99% efficient

Total waste: 96 KB (1% of page weight)

Unused JS 96 KB

0.03g unnecessary CO2 per visit

Actual transfer 6781 KB
Theoretical minimum 6684 KB
Potential savings 96 KB (0.03g CO2)

See Deep Analysis sections above for specific optimizations.

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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