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https://www.walmart.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
56
GRADE
D
FIX
4
REVIEW
1
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 1 REVIEW 4 FIX
D
CO2 Per Page Load
Action
1.02g CO2 per view
FIX
1.02g CO2 per view
Warning::
1.02g CO2 per page view
This page transfers 3.6 MB, producing an estimated 1.02g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.19g, network 0.18g, end-user device 0.65g.
Got: 1.02g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 122.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 122.0 kg of CO2 annually — equivalent to charging 15246 smartphones.

1.02g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 39% of websites

Sustainable Web Design model v4 · Page size: 3.6 MB

Your site
1.02g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.19g
Network
0.18g
End-user device
0.65g
At 10,000 monthly views: Monthly: 10.2 kg · Annual: 122.0 kg · ≈ 15246 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 Next.js✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

D
Carbon Budget
Action
61th percentile
FIX
61th percentile
Warning::
1.02g CO2 — above the median website (0.60g)
Heavier than an estimated 39% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 61th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.02g

61st percentile

Cleaner than 39% of websites

✗ Above the median website

vs Median 69% more
vs Target 103% more
F
Transfer Efficiency
Action
0% efficient
FIX
0% efficient
Critical::
Transfer efficiency: 0%
An estimated 5216 KB (100%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 5216 KB of unused JavaScript. This wasted data produces 1.44g of unnecessary CO2 per page view.
0% efficient

Total waste: 5216 KB (100% of page weight)

Unused JS 5216 KB

1.44g unnecessary CO2 per visit

Actual transfer 3675 KB
Theoretical minimum 0 KB
Potential savings 5216 KB (1.44g CO2)

See Deep Analysis sections above for specific optimizations.

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 84 KB (vs 3675 KB first visit). 405 of 410 resources are served from browser cache, saving 0.99g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.02g)
First visit
3675 KB
Repeat visit
84 KB

98% reduction on repeat visits

Saving 0.99g CO2 per returning visitor

405 resources served from cache · 5 resources re-downloaded

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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