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https://nike.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
2.32g CO2 per view
FIX
2.32g CO2 per view
Critical::
2.32g CO2 per page view
This page transfers 8.2 MB, producing an estimated 2.32g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.43g, network 0.40g, end-user device 1.49g.
Got: 2.32g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 277.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 277.8 kg of CO2 annually — equivalent to charging 34729 smartphones.

2.32g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 8.2 MB

Your site
2.32g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.43g
Network
0.40g
End-user device
1.49g
At 10,000 monthly views: Monthly: 23.2 kg · Annual: 277.8 kg · ≈ 34729 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::
AWS: Renewable energy varies by region; committed to 100% by 2025
Info::
AWS CloudFront: Renewable varies by edge location
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 AWS✗CDN AWS CloudFront✗

AWS: Renewable energy varies by region; committed to 100% by 2025

AWS CloudFront: Renewable varies by edge location

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.32g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

2.32g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 286% more
vs Target 363% 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
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 132 KB (vs 8371 KB first visit). 184 of 188 resources are served from browser cache, saving 2.28g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 2.32g)
First visit
8371 KB
Repeat visit
132 KB

98% reduction on repeat visits

Saving 2.28g CO2 per returning visitor

184 resources served from cache · 4 resources re-downloaded

A+
Transfer Efficiency
95% efficient
PASS
95% efficient
Info::
Transfer efficiency: 95%
Only 441 KB of potential savings identified. Your page is well-optimized for size.
95% efficient

Total waste: 441 KB (5% of page weight)

Unused JS 441 KB

0.12g unnecessary CO2 per visit

Actual transfer 8371 KB
Theoretical minimum 7930 KB
Potential savings 441 KB (0.12g 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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