https://choicervoicer.games
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
83
GRADE
B
FIX
1
REVIEW
2
PASS
4
INFO
1
Checks
84 PASS 2 REVIEW 1 FIX
DCarbon BudgetAction52th percentileFIX
Carbon Budget
Action52th percentile
52th percentile
Warning::
0.68g CO2 — above the median website (0.60g)
Heavier than an estimated 48% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 52th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.68g
52nd percentile
Cleaner than 48% of websites
✗ Above the median website
vs Median 13% more
vs Target 36% more
BCO2 Per Page Load0.68g CO2 per viewREVIEW
CO2 Per Page Load
0.68g CO2 per view
0.68g CO2 per view
Info::
0.68g CO2 per page view
This page transfers 2.9 MB, producing an estimated 0.68g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.14g, end-user device 0.52g.
Got: 0.68g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 81.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 81.6 kg of CO2 annually — equivalent to charging 10199 smartphones.
Info::
Green hosting reduces data center emissions
0.68g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 48% of websites
Sustainable Web Design model v4 · Page size: 2.9 MB
Your site
0.68g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.14g
End-user device
0.52g
At 10,000 monthly views: Monthly: 6.8 kg · Annual: 81.6 kg · ≈ 10199 smartphone charges
BTransfer Efficiency84% efficientREVIEW
Transfer Efficiency
84% efficient
84% efficient
Info::
Transfer efficiency: 84%
An estimated 477 KB (16%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 477 KB of unused JavaScript. This wasted data produces 0.11g of unnecessary CO2 per page view.
Total waste: 477 KB (16% of page weight)
Unused JS 477 KB
0.11g unnecessary CO2 per visit
Actual transfer 2941 KB
Theoretical minimum 2464 KB
Potential savings 477 KB (0.11g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Next.js, CDN: Cloudflare
Info::
Next.js: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Cloudflare✓
Next.js: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 191 KB (vs 2941 KB first visit). 135 of 152 resources are served from browser cache, saving 0.64g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 0.68g)
First visit
2941 KB
Repeat visit
191 KB
94% reduction on repeat visits
Saving 0.64g CO2 per returning visitor
135 resources served from cache · 17 resources re-downloaded
A+Web Font Weight Variants2 font weights loaded across 2 famil(y/ies) -- reasonablePASS
Web Font Weight Variants
2 font weights loaded across 2 famil(y/ies) -- reasonable
2 font weights loaded across 2 famil(y/ies) -- reasonable
Info::
2 font weight(s) loaded across 2 famil(y/ies)
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: Cloudflare
Image Optimization9 images, 517 KB total, 397 KB wastedINFO
Image Optimization
9 images, 517 KB total, 397 KB wasted
Image Optimization Audit
Total Images
9
Total Size
517 KB
Oversized
5
Wasted
397 KB
1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.