https://iacr.org
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
80
GRADE
B
FIX
2
REVIEW
0
PASS
4
INFO
0
Checks
64 PASS 2 FIX
DCO2 Per Page LoadAction1.23g CO2 per viewFIX
CO2 Per Page Load
Action1.23g CO2 per view
1.23g CO2 per view
Warning::
1.23g CO2 per page view
This page transfers 5.2 MB, producing an estimated 1.23g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.26g, end-user device 0.95g.
Got: 1.23g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 148.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 148.1 kg of CO2 annually — equivalent to charging 18515 smartphones.
Info::
Green hosting reduces data center emissions
1.23g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 32% of websites
Sustainable Web Design model v4 · Page size: 5.2 MB
Your site
1.23g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.26g
End-user device
0.95g
At 10,000 monthly views: Monthly: 12.3 kg · Annual: 148.1 kg · ≈ 18515 smartphone charges
DCarbon BudgetAction68th percentileFIX
Carbon Budget
Action68th percentile
68th percentile
Warning::
1.23g CO2 — above the median website (0.60g)
Heavier than an estimated 32% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 68th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.23g
68th percentile
Cleaner than 32% of websites
✗ Above the median website
vs Median 106% more
vs Target 147% more
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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 7 KB (vs 5340 KB first visit). 32 of 33 resources are served from browser cache, saving 1.23g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.23g)
First visit
5340 KB
Repeat visit
7 KB
100% reduction on repeat visits
Saving 1.23g CO2 per returning visitor
32 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 5340 KB
Theoretical minimum 5340 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: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.