https://ansa.it
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
DCO2 Per Page LoadAction0.87g CO2 per viewFIX
CO2 Per Page Load
Action0.87g CO2 per view
0.87g CO2 per view
Info::
0.87g CO2 per page view
This page transfers 3.7 MB, producing an estimated 0.87g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.18g, end-user device 0.67g.
Got: 0.87g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 104.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 104.0 kg of CO2 annually — equivalent to charging 13002 smartphones.
Info::
Green hosting reduces data center emissions
0.87g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 43% of websites
Sustainable Web Design model v4 · Page size: 3.7 MB
Your site
0.87g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.18g
End-user device
0.67g
At 10,000 monthly views: Monthly: 8.7 kg · Annual: 104.0 kg · ≈ 13002 smartphone charges
DCarbon BudgetAction57th percentileFIX
Carbon Budget
Action57th percentile
57th percentile
Warning::
0.87g CO2 — above the median website (0.60g)
Heavier than an estimated 43% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 57th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.87g
57th percentile
Cleaner than 43% of websites
✗ Above the median website
vs Median 44% more
vs Target 73% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Cloudflare uses renewable energy
Info::
Cloudflare: 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 Cloudflare✓CDN Not identified✗
Cloudflare: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency75% efficientREVIEW
Transfer Efficiency
75% efficient
75% efficient
Info::
Transfer efficiency: 75%
An estimated 921 KB (25%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 921 KB of unused JavaScript. This wasted data produces 0.21g of unnecessary CO2 per page view.
Total waste: 921 KB (25% of page weight)
Unused JS 921 KB
0.21g unnecessary CO2 per visit
Actual transfer 3750 KB
Theoretical minimum 2829 KB
Potential savings 921 KB (0.21g CO2)
See Deep Analysis sections above for specific optimizations.
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 106 KB (vs 3750 KB first visit). 139 of 144 resources are served from browser cache, saving 0.84g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.87g)
First visit
3750 KB
Repeat visit
106 KB
97% reduction on repeat visits
Saving 0.84g CO2 per returning visitor
139 resources served from cache · 5 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.