Skip to content
https://ebay.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
58
GRADE
D
FIX
3
REVIEW
2
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.50g CO2 per view
FIX
1.50g CO2 per view
Warning::
1.50g CO2 per page view
This page transfers 5.3 MB, producing an estimated 1.50g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.28g, network 0.26g, end-user device 0.96g.
Got: 1.50g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 180.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 180.2 kg of CO2 annually — equivalent to charging 22524 smartphones.

1.50g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 25% of websites

Sustainable Web Design model v4 · Page size: 5.3 MB

Your site
1.50g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.28g
Network
0.26g
End-user device
0.96g
At 10,000 monthly views: Monthly: 15.0 kg · Annual: 180.2 kg · ≈ 22524 smartphone charges
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
75th percentile
FIX
75th percentile
Warning::
1.50g CO2 — above the median website (0.60g)
Heavier than an estimated 25% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 75th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.50g

75th percentile

Cleaner than 25% of websites

✗ Above the median website

vs Median 150% more
vs Target 200% more
B
Transfer Efficiency
88% efficient
REVIEW
88% efficient
Info::
Transfer efficiency: 88%
An estimated 624 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 624 KB of unused JavaScript. This wasted data produces 0.17g of unnecessary CO2 per page view.
88% efficient

Total waste: 624 KB (12% of page weight)

Unused JS 624 KB

0.17g unnecessary CO2 per visit

Actual transfer 5429 KB
Theoretical minimum 4804 KB
Potential savings 624 KB (0.17g 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 107 KB (vs 5429 KB first visit). 305 of 312 resources are served from browser cache, saving 1.47g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.50g)
First visit
5429 KB
Repeat visit
107 KB

98% reduction on repeat visits

Saving 1.47g CO2 per returning visitor

305 resources served from cache · 7 resources re-downloaded

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

Send Feedback