https://vocal.media
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
72
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCarbon BudgetAction52th percentileFIX
Carbon Budget
Action52th percentile
52th percentile
Warning::
0.67g 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
0.67g
52nd percentile
Cleaner than 48% of websites
✗ Above the median website
vs Median 12% more
vs Target 35% more
FTransfer EfficiencyAction26% efficientFIX
Transfer Efficiency
Action26% efficient
26% efficient
Critical::
Transfer efficiency: 26%
An estimated 2172 KB (74%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2172 KB of unused JavaScript. This wasted data produces 0.50g of unnecessary CO2 per page view.
Total waste: 2172 KB (74% of page weight)
Unused JS 2172 KB
0.50g unnecessary CO2 per visit
Actual transfer 2919 KB
Theoretical minimum 746 KB
Potential savings 2172 KB (0.50g CO2)
See Deep Analysis sections above for specific optimizations.
BCO2 Per Page Load0.67g CO2 per viewREVIEW
CO2 Per Page Load
0.67g CO2 per view
0.67g CO2 per view
Info::
0.67g CO2 per page view
This page transfers 2.9 MB, producing an estimated 0.67g 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: 0.67g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 81.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 81.0 kg of CO2 annually — equivalent to charging 10120 smartphones.
Info::
Green hosting reduces data center emissions
0.67g
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
0.67g
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: 6.7 kg · Annual: 81.0 kg · ≈ 10120 smartphone charges
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Amazon Web Services, CDN: Cloudflare
Info::
Amazon Web Services: 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 Amazon Web Services✓CDN Cloudflare✓
Amazon Web Services: 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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 32 KB (vs 2919 KB first visit). 254 of 258 resources are served from browser cache, saving 0.67g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.67g)
First visit
2919 KB
Repeat visit
32 KB
99% reduction on repeat visits
Saving 0.67g CO2 per returning visitor
254 resources served from cache · 4 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: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.