https://zerohedge.com
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
2
PASS
2
INFO
0
Checks
62 PASS 2 REVIEW 2 FIX
DCarbon BudgetAction54th percentileFIX
Carbon Budget
Action54th percentile
54th percentile
Warning::
0.74g CO2 — above the median website (0.60g)
Heavier than an estimated 46% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 54th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.74g
54th percentile
Cleaner than 46% of websites
✗ Above the median website
vs Median 24% more
vs Target 48% more
DTransfer EfficiencyAction53% efficientFIX
Transfer Efficiency
Action53% efficient
53% efficient
Warning::
Transfer efficiency: 53%
An estimated 1504 KB (47%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1504 KB of unused JavaScript. This wasted data produces 0.35g of unnecessary CO2 per page view.
Total waste: 1504 KB (47% of page weight)
Unused JS 1504 KB
0.35g unnecessary CO2 per visit
Actual transfer 3211 KB
Theoretical minimum 1706 KB
Potential savings 1504 KB (0.35g CO2)
See Deep Analysis sections above for specific optimizations.
BCO2 Per Page Load0.74g CO2 per viewREVIEW
CO2 Per Page Load
0.74g CO2 per view
0.74g CO2 per view
Info::
0.74g CO2 per page view
This page transfers 3.1 MB, producing an estimated 0.74g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.15g, end-user device 0.57g.
Got: 0.74g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 89.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 89.1 kg of CO2 annually — equivalent to charging 11133 smartphones.
Info::
Green hosting reduces data center emissions
0.74g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 46% of websites
Sustainable Web Design model v4 · Page size: 3.1 MB
Your site
0.74g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.15g
End-user device
0.57g
At 10,000 monthly views: Monthly: 7.4 kg · Annual: 89.1 kg · ≈ 11133 smartphone charges
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Next.js uses renewable energy
Info::
Next.js: 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 Next.js✓CDN Not identified✗
Next.js: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 59 KB (vs 3211 KB first visit). 197 of 206 resources are served from browser cache, saving 0.73g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.74g)
First visit
3211 KB
Repeat visit
59 KB
98% reduction on repeat visits
Saving 0.73g CO2 per returning visitor
197 resources served from cache · 9 resources re-downloaded
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
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.