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 LoadAction0.85g CO2 per viewFIX
CO2 Per Page Load
Action0.85g CO2 per view
0.85g CO2 per view
Info::
0.85g CO2 per page view
This page transfers 3.6 MB, producing an estimated 0.85g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.18g, end-user device 0.65g.
Got: 0.85g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 102.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 102.0 kg of CO2 annually — equivalent to charging 12751 smartphones.
Info::
Green hosting reduces data center emissions
0.85g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 43% of websites
Sustainable Web Design model v4 · Page size: 3.6 MB
Your site
0.85g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.18g
End-user device
0.65g
At 10,000 monthly views: Monthly: 8.5 kg · Annual: 102.0 kg · ≈ 12751 smartphone charges
DCarbon BudgetAction57th percentileFIX
Carbon Budget
Action57th percentile
57th percentile
Warning::
0.85g 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
0.85g
57th percentile
Cleaner than 43% of websites
✗ Above the median website
vs Median 42% more
vs Target 70% 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
CTransfer EfficiencyAction75% efficientREVIEW
Transfer Efficiency
Action75% efficient
75% efficient
Warning::
Transfer efficiency: 75%
An estimated 924 KB (25%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 924 KB of unused JavaScript. This wasted data produces 0.21g of unnecessary CO2 per page view.
Total waste: 924 KB (25% of page weight)
Unused JS 924 KB
0.21g unnecessary CO2 per visit
Actual transfer 3677 KB
Theoretical minimum 2752 KB
Potential savings 924 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 3677 KB first visit). 120 of 125 resources are served from browser cache, saving 0.83g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.85g)
First visit
3677 KB
Repeat visit
106 KB
97% reduction on repeat visits
Saving 0.83g CO2 per returning visitor
120 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.