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 LoadAction1.94g CO2 per viewFIX
CO2 Per Page Load
Action1.94g CO2 per view
1.94g CO2 per view
Warning::
1.94g CO2 per page view
This page transfers 6.8 MB, producing an estimated 1.94g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.36g, network 0.33g, end-user device 1.24g.
Got: 1.94g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 232.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 232.5 kg of CO2 annually — equivalent to charging 29057 smartphones.
1.94g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 12% of websites
Sustainable Web Design model v4 · Page size: 6.8 MB
Your site
1.94g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.36g
Network
0.33g
End-user device
1.24g
At 10,000 monthly views: Monthly: 19.4 kg · Annual: 232.5 kg · ≈ 29057 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 BudgetAction88th percentileFIX
Carbon Budget
Action88th percentile
88th percentile
Warning::
1.94g CO2 — above the median website (0.60g)
Heavier than an estimated 12% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 88th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.94g
88th percentile
Cleaner than 12% of websites
✗ Above the median website
vs Median 223% more
vs Target 287% more
BRepeat Visit Weight74% cachedREVIEW
Repeat Visit Weight
74% cached
74% cached
Info::
74% reduction on repeat visits
Returning visitors download only 1822 KB (vs 7004 KB first visit). 208 of 212 resources are served from browser cache, saving 1.43g CO2 per repeat visit.
Info::
Repeat visit: 0.50g CO2 (first visit: 1.94g)
First visit
7004 KB
Repeat visit
1822 KB
74% reduction on repeat visits
Saving 1.43g CO2 per returning visitor
208 resources served from cache · 4 resources re-downloaded
BTransfer Efficiency78% efficientREVIEW
Transfer Efficiency
78% efficient
78% efficient
Info::
Transfer efficiency: 78%
An estimated 1506 KB (22%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1506 KB of unused JavaScript. This wasted data produces 0.42g of unnecessary CO2 per page view.
Total waste: 1506 KB (22% of page weight)
Unused JS 1506 KB
0.42g unnecessary CO2 per visit
Actual transfer 7004 KB
Theoretical minimum 5498 KB
Potential savings 1506 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.