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https://bnnbloomberg.ca

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
52
GRADE
F
FIX
3
REVIEW
2
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.70g CO2 per view
FIX
1.70g CO2 per view
Warning::
1.70g CO2 per page view
This page transfers 6.0 MB, producing an estimated 1.70g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.31g, network 0.29g, end-user device 1.09g.
Got: 1.70g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 203.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 203.9 kg of CO2 annually — equivalent to charging 25482 smartphones.

1.70g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 19% of websites

Sustainable Web Design model v4 · Page size: 6.0 MB

Your site
1.70g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.31g
Network
0.29g
End-user device
1.09g
At 10,000 monthly views: Monthly: 17.0 kg · Annual: 203.9 kg · ≈ 25482 smartphone charges
D
Green Hosting
Action
Not green
FIX
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

F
Carbon Budget
Action
81th percentile
FIX
81th percentile
Warning::
1.70g CO2 — above the median website (0.60g)
Heavier than an estimated 19% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 81th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.70g

81st percentile

Cleaner than 19% of websites

✗ Above the median website

vs Median 183% more
vs Target 240% more
C
Transfer Efficiency
Action
63% efficient
REVIEW
63% efficient
Warning::
Transfer efficiency: 63%
An estimated 2300 KB (37%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2300 KB of unused JavaScript. This wasted data produces 0.64g of unnecessary CO2 per page view.
63% efficient

Total waste: 2300 KB (37% of page weight)

Unused JS 2300 KB

0.64g unnecessary CO2 per visit

Actual transfer 6142 KB
Theoretical minimum 3842 KB
Potential savings 2300 KB (0.64g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
94% cached
PASS
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 378 KB (vs 6142 KB first visit). 217 of 228 resources are served from browser cache, saving 1.59g CO2 per repeat visit.
Info::
Repeat visit: 0.10g CO2 (first visit: 1.70g)
First visit
6142 KB
Repeat visit
378 KB

94% reduction on repeat visits

Saving 1.59g CO2 per returning visitor

217 resources served from cache · 11 resources re-downloaded

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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