https://miui.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
79
GRADE
C
FIX
1
REVIEW
2
PASS
3
INFO
0
Checks
63 PASS 2 REVIEW 1 FIX
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Next.js✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCarbon Budget39th percentileREVIEW
Carbon Budget
39th percentile
39th percentile
Info::
0.50g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 61% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 39th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.50g
39th percentile
Cleaner than 61% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 17% cleaner ✓
vs Target 1% cleaner ✓
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
ACO2 Per Page Load0.50g CO2 per viewPASS
CO2 Per Page Load
0.50g CO2 per view
0.50g CO2 per view
Info::
0.50g CO2 per page view
This page transfers 1.8 MB, producing an estimated 0.50g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.09g, network 0.09g, end-user device 0.32g.
Got: 0.50g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 59.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 59.6 kg of CO2 annually — equivalent to charging 7447 smartphones.
0.50g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 61% of websites
Sustainable Web Design model v4 · Page size: 1.8 MB
Your site
0.50g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.09g
Network
0.09g
End-user device
0.32g
At 10,000 monthly views: Monthly: 5.0 kg · Annual: 59.6 kg · ≈ 7447 smartphone charges
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 18 KB (vs 1795 KB first visit). 81 of 82 resources are served from browser cache, saving 0.49g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.50g)
First visit
1795 KB
Repeat visit
18 KB
99% reduction on repeat visits
Saving 0.49g CO2 per returning visitor
81 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 45 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 45 KB (3% of page weight)
Unused JS 45 KB
0.01g unnecessary CO2 per visit
Actual transfer 1795 KB
Theoretical minimum 1749 KB
Potential savings 45 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.