https://cloudflare.net
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
68
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction1.76g CO2 per viewFIX
CO2 Per Page Load
Action1.76g CO2 per view
1.76g CO2 per view
Warning::
1.76g CO2 per page view
This page transfers 7.4 MB, producing an estimated 1.76g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.36g, end-user device 1.35g.
Got: 1.76g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 211.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 211.0 kg of CO2 annually — equivalent to charging 26370 smartphones.
Info::
Green hosting reduces data center emissions
1.76g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 17% of websites
Sustainable Web Design model v4 · Page size: 7.4 MB
Your site
1.76g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.36g
End-user device
1.35g
At 10,000 monthly views: Monthly: 17.6 kg · Annual: 211.0 kg · ≈ 26370 smartphone charges
FCarbon BudgetAction83th percentileFIX
Carbon Budget
Action83th percentile
83th percentile
Warning::
1.76g CO2 — above the median website (0.60g)
Heavier than an estimated 17% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 83th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.76g
83rd percentile
Cleaner than 17% of websites
✗ Above the median website
vs Median 193% more
vs Target 252% more
BTransfer Efficiency88% efficientREVIEW
Transfer Efficiency
88% efficient
88% efficient
Info::
Transfer efficiency: 88%
An estimated 916 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 916 KB of unused JavaScript. This wasted data produces 0.21g of unnecessary CO2 per page view.
Total waste: 916 KB (12% of page weight)
Unused JS 916 KB
0.21g unnecessary CO2 per visit
Actual transfer 7605 KB
Theoretical minimum 6689 KB
Potential savings 916 KB (0.21g 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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 23 KB (vs 7605 KB first visit). 150 of 155 resources are served from browser cache, saving 1.75g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.76g)
First visit
7605 KB
Repeat visit
23 KB
100% reduction on repeat visits
Saving 1.75g CO2 per returning visitor
150 resources served from cache · 5 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.