https://deutschlandfunkkultur.de
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
72
GRADE
C
FIX
2
REVIEW
2
PASS
2
INFO
0
Checks
62 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.08g CO2 per viewFIX
CO2 Per Page Load
Action1.08g CO2 per view
1.08g CO2 per view
Warning::
1.08g CO2 per page view
This page transfers 4.6 MB, producing an estimated 1.08g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.22g, end-user device 0.83g.
Got: 1.08g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 130.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 130.0 kg of CO2 annually — equivalent to charging 16251 smartphones.
Info::
Green hosting reduces data center emissions
1.08g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 37% of websites
Sustainable Web Design model v4 · Page size: 4.6 MB
Your site
1.08g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.22g
End-user device
0.83g
At 10,000 monthly views: Monthly: 10.8 kg · Annual: 130.0 kg · ≈ 16251 smartphone charges
DCarbon BudgetAction63th percentileFIX
Carbon Budget
Action63th percentile
63th percentile
Warning::
1.08g CO2 — above the median website (0.60g)
Heavier than an estimated 37% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 63th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.08g
63rd percentile
Cleaner than 37% of websites
✗ Above the median website
vs Median 81% more
vs Target 117% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: 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 Google Cloud✓CDN Not identified✗
Google Cloud: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency87% efficientREVIEW
Transfer Efficiency
87% efficient
87% efficient
Info::
Transfer efficiency: 87%
An estimated 612 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 612 KB of unused JavaScript. This wasted data produces 0.14g of unnecessary CO2 per page view.
Total waste: 612 KB (13% of page weight)
Unused JS 612 KB
0.14g unnecessary CO2 per visit
Actual transfer 4687 KB
Theoretical minimum 4074 KB
Potential savings 612 KB (0.14g CO2)
See Deep Analysis sections above for specific optimizations.
A+Repeat Visit Weight87% cachedPASS
Repeat Visit Weight
87% cached
87% cached
Info::
87% reduction on repeat visits
Returning visitors download only 624 KB (vs 4687 KB first visit). 61 of 62 resources are served from browser cache, saving 0.94g CO2 per repeat visit.
Info::
Repeat visit: 0.14g CO2 (first visit: 1.08g)
First visit
4687 KB
Repeat visit
624 KB
87% reduction on repeat visits
Saving 0.94g CO2 per returning visitor
61 resources served from cache · 1 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: Google Cloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.