https://epo.org
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
76
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction1.11g CO2 per viewFIX
CO2 Per Page Load
Action1.11g CO2 per view
1.11g CO2 per view
Warning::
1.11g CO2 per page view
This page transfers 4.7 MB, producing an estimated 1.11g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.23g, end-user device 0.85g.
Got: 1.11g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 133.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 133.4 kg of CO2 annually — equivalent to charging 16679 smartphones.
Info::
Green hosting reduces data center emissions
1.11g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 36% of websites
Sustainable Web Design model v4 · Page size: 4.7 MB
Your site
1.11g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.23g
End-user device
0.85g
At 10,000 monthly views: Monthly: 11.1 kg · Annual: 133.4 kg · ≈ 16679 smartphone charges
DCarbon BudgetAction64th percentileFIX
Carbon Budget
Action64th percentile
64th percentile
Warning::
1.11g CO2 — above the median website (0.60g)
Heavier than an estimated 36% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 64th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.11g
64th percentile
Cleaner than 36% of websites
✗ Above the median website
vs Median 85% more
vs Target 122% more
BTransfer Efficiency82% efficientREVIEW
Transfer Efficiency
82% efficient
82% efficient
Info::
Transfer efficiency: 82%
An estimated 844 KB (18%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 844 KB of unused JavaScript. This wasted data produces 0.20g of unnecessary CO2 per page view.
Total waste: 844 KB (18% of page weight)
Unused JS 844 KB
0.20g unnecessary CO2 per visit
Actual transfer 4810 KB
Theoretical minimum 3966 KB
Potential savings 844 KB (0.20g 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: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: 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 Cloudflare✓CDN Cloudflare✓
Cloudflare: 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 67 KB (vs 4810 KB first visit). 74 of 75 resources are served from browser cache, saving 1.10g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.11g)
First visit
4810 KB
Repeat visit
67 KB
99% reduction on repeat visits
Saving 1.10g CO2 per returning visitor
74 resources served from cache · 1 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.