https://skift.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction4.76g CO2 per viewFIX
CO2 Per Page Load
Action4.76g CO2 per view
4.76g CO2 per view
Critical::
4.76g CO2 per page view
This page transfers 20.1 MB, producing an estimated 4.76g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.12g, network 0.99g, end-user device 3.66g.
Got: 4.76g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 571.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 571.6 kg of CO2 annually — equivalent to charging 71454 smartphones.
Info::
Green hosting reduces data center emissions
4.76g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 20.1 MB
Your site
4.76g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.12g
Network
0.99g
End-user device
3.66g
At 10,000 monthly views: Monthly: 47.6 kg · Annual: 571.6 kg · ≈ 71454 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
4.76g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
4.76g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 694% more
vs Target 853% more
BTransfer Efficiency80% efficientREVIEW
Transfer Efficiency
80% efficient
80% efficient
Info::
Transfer efficiency: 80%
An estimated 4026 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 4026 KB of unused JavaScript. This wasted data produces 0.93g of unnecessary CO2 per page view.
Total waste: 4026 KB (20% of page weight)
Unused JS 4026 KB
0.93g unnecessary CO2 per visit
Actual transfer 20609 KB
Theoretical minimum 16582 KB
Potential savings 4026 KB (0.93g CO2)
See Deep Analysis sections above for specific optimizations.
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 Weight88% cachedPASS
Repeat Visit Weight
88% cached
88% cached
Info::
88% reduction on repeat visits
Returning visitors download only 2420 KB (vs 20609 KB first visit). 918 of 994 resources are served from browser cache, saving 4.20g CO2 per repeat visit.
Info::
Repeat visit: 0.56g CO2 (first visit: 4.76g)
First visit
20609 KB
Repeat visit
2420 KB
88% reduction on repeat visits
Saving 4.20g CO2 per returning visitor
918 resources served from cache · 76 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.