https://bpb.de
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
86
GRADE
B
FIX
0
REVIEW
2
PASS
4
INFO
0
Checks
64 PASS 2 REVIEW
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
noris network AG uses renewable energy
Info::
noris network AG: 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 noris network AG✓CDN Not identified✗
noris network AG: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency79% efficientREVIEW
Transfer Efficiency
79% efficient
79% efficient
Info::
Transfer efficiency: 79%
An estimated 222 KB (21%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 222 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 222 KB (21% of page weight)
Unused JS 222 KB
0.05g unnecessary CO2 per visit
Actual transfer 1062 KB
Theoretical minimum 839 KB
Potential savings 222 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
ACO2 Per Page Load0.25g CO2 per viewPASS
CO2 Per Page Load
0.25g CO2 per view
0.25g CO2 per view
Info::
0.25g CO2 per page view
This page transfers 1.0 MB, producing an estimated 0.25g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.05g, end-user device 0.19g.
Got: 0.25g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 29.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 29.5 kg of CO2 annually — equivalent to charging 3683 smartphones.
Info::
Green hosting reduces data center emissions
0.25g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 86% of websites
Sustainable Web Design model v4 · Page size: 1.0 MB
Your site
0.25g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.05g
End-user device
0.19g
At 10,000 monthly views: Monthly: 2.5 kg · Annual: 29.5 kg · ≈ 3683 smartphone charges
A+Repeat Visit Weight95% cachedPASS
Repeat Visit Weight
95% cached
95% cached
Info::
95% reduction on repeat visits
Returning visitors download only 48 KB (vs 1062 KB first visit). 55 of 56 resources are served from browser cache, saving 0.23g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.25g)
First visit
1062 KB
Repeat visit
48 KB
95% reduction on repeat visits
Saving 0.23g CO2 per returning visitor
55 resources served from cache · 1 resources re-downloaded
ACarbon Budget14th percentilePASS
Carbon Budget
14th percentile
14th percentile
Info::
0.25g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 86% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 14th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.25g
14th percentile
Cleaner than 86% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 59% cleaner ✓
vs Target 51% cleaner ✓
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: noris network AG
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.