https://esa.int
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
62
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction3.51g CO2 per viewFIX
CO2 Per Page Load
Action3.51g CO2 per view
3.51g CO2 per view
Critical::
3.51g CO2 per page view
This page transfers 14.8 MB, producing an estimated 3.51g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.09g, network 0.73g, end-user device 2.70g.
Got: 3.51g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 421.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 421.3 kg of CO2 annually — equivalent to charging 52668 smartphones.
Info::
Green hosting reduces data center emissions
3.51g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 14.8 MB
Your site
3.51g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.09g
Network
0.73g
End-user device
2.70g
At 10,000 monthly views: Monthly: 35.1 kg · Annual: 421.3 kg · ≈ 52668 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.51g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
3.51g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 485% more
vs Target 602% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Apache HTTP Server uses renewable energy
Info::
Apache HTTP Server: 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 Apache HTTP Server✓CDN Not identified✗
Apache HTTP Server: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 8 KB (vs 15190 KB first visit). 112 of 113 resources are served from browser cache, saving 3.51g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 3.51g)
First visit
15190 KB
Repeat visit
8 KB
100% reduction on repeat visits
Saving 3.51g CO2 per returning visitor
112 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency100% efficientPASS
Transfer Efficiency
100% efficient
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
Actual transfer 15190 KB
Theoretical minimum 15190 KB
See Deep Analysis sections above for specific optimizations.
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: OVHcloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.