Skip to content
https://abc7chicago.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
54
GRADE
F
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
F
CO2 Per Page Load
Action
4.13g CO2 per view
FIX
4.13g CO2 per view
Critical::
4.13g CO2 per page view
This page transfers 14.6 MB, producing an estimated 4.13g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.76g, network 0.71g, end-user device 2.65g.
Got: 4.13g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 495.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 495.4 kg of CO2 annually — equivalent to charging 61923 smartphones.

4.13g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 14.6 MB

Your site
4.13g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.76g
Network
0.71g
End-user device
2.65g
At 10,000 monthly views: Monthly: 41.3 kg · Annual: 495.4 kg · ≈ 61923 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::
AWS: Renewable energy varies by region; committed to 100% by 2025
Info::
AWS CloudFront: Renewable varies by edge location
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 AWS✗CDN AWS CloudFront✗

AWS: Renewable energy varies by region; committed to 100% by 2025

AWS CloudFront: Renewable varies by edge location

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
4.13g 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

4.13g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 588% more
vs Target 726% more
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 130 KB (vs 14927 KB first visit). 397 of 401 resources are served from browser cache, saving 4.09g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 4.13g)
First visit
14927 KB
Repeat visit
130 KB

99% reduction on repeat visits

Saving 4.09g CO2 per returning visitor

397 resources served from cache · 4 resources re-downloaded

A+
Transfer Efficiency
94% efficient
PASS
94% efficient
Info::
Transfer efficiency: 94%
Only 898 KB of potential savings identified. Your page is well-optimized for size.
94% efficient

Total waste: 898 KB (6% of page weight)

Unused JS 898 KB

0.25g unnecessary CO2 per visit

Actual transfer 14927 KB
Theoretical minimum 14028 KB
Potential savings 898 KB (0.25g CO2)

See Deep Analysis sections above for specific optimizations.

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

Send Feedback