https://cnbc.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
58
GRADE
D
FIX
3
REVIEW
4
PASS
0
INFO
1
Checks
84 REVIEW 3 FIX
FCO2 Per Page LoadAction2.10g CO2 per viewFIX
CO2 Per Page Load
Action2.10g CO2 per view
2.10g CO2 per view
Critical::
2.10g CO2 per page view
This page transfers 7.4 MB, producing an estimated 2.10g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.39g, network 0.36g, end-user device 1.35g.
Got: 2.10g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 251.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 251.6 kg of CO2 annually — equivalent to charging 31445 smartphones.
2.10g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 7.4 MB
Your site
2.10g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.39g
Network
0.36g
End-user device
1.35g
At 10,000 monthly views: Monthly: 21.0 kg · Annual: 251.6 kg · ≈ 31445 smartphone charges
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 Amazon Web Services✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
2.10g 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
2.10g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 249% more
vs Target 319% more
BRepeat Visit Weight76% cachedREVIEW
Repeat Visit Weight
76% cached
76% cached
Info::
76% reduction on repeat visits
Returning visitors download only 1823 KB (vs 7580 KB first visit). 214 of 218 resources are served from browser cache, saving 1.59g CO2 per repeat visit.
Info::
Repeat visit: 0.50g CO2 (first visit: 2.10g)
First visit
7580 KB
Repeat visit
1823 KB
76% reduction on repeat visits
Saving 1.59g CO2 per returning visitor
214 resources served from cache · 4 resources re-downloaded
BTransfer Efficiency80% efficientREVIEW
Transfer Efficiency
80% efficient
80% efficient
Info::
Transfer efficiency: 80%
An estimated 1520 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1520 KB of unused JavaScript. This wasted data produces 0.42g of unnecessary CO2 per page view.
Total waste: 1520 KB (20% of page weight)
Unused JS 1520 KB
0.42g unnecessary CO2 per visit
Actual transfer 7580 KB
Theoretical minimum 6060 KB
Potential savings 1520 KB (0.42g CO2)
See Deep Analysis sections above for specific optimizations.
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
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
Image Optimization48 images, 0 KB total, 0 KB wastedINFO
Image Optimization
48 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
48
Total Size
0 KB
48 missing dimensions 10 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.