Skip to content
https://mohammed0912474-source.github.io/qa-supply-chain-app/

Sustainability

· 7 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
2
PASS
5
INFO
0
Device:
Mobile Desktop
Checks
7
5 PASS 2 REVIEW
B
Transfer Efficiency
78% efficient
REVIEW
78% efficient
Info::
Transfer efficiency: 78%
An estimated 112 KB (22%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 112 KB of unused JavaScript. This wasted data produces 0.03g of unnecessary CO2 per page view.
78% efficient

Total waste: 112 KB (22% of page weight)

Unused JS 112 KB

0.03g unnecessary CO2 per visit

Actual transfer 502 KB
Theoretical minimum 389 KB
Potential savings 112 KB (0.03g CO2)

See Deep Analysis sections above for specific optimizations.

C
Web Font Weight Variants
Action
9 font weights loaded across 2 famil(y/ies)
REVIEW
9 font weights loaded across 2 famil(y/ies)
Warning::
9 font weights loaded -- likely 100+ KB of unused payload
Loading 9 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Cairo, IBM Plex Sans.
A+
CO2 Per Page Load
0.12g CO2 per view
PASS
0.12g CO2 per view
Info::
0.12g CO2 per page view
This page transfers 0.5 MB, producing an estimated 0.12g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.09g.
Got: 0.12g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 13.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 13.9 kg of CO2 annually — equivalent to charging 1741 smartphones.
Info::
Green hosting reduces data center emissions

0.12g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.5 MB

Your site
0.12g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.00g
Network
0.02g
End-user device
0.09g
At 10,000 monthly views: Monthly: 1.2 kg · Annual: 13.9 kg · ≈ 1741 smartphone charges
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: GitHub Pages, CDN: GitHub Pages
Info::
GitHub Pages: Verified by the Green Web Foundation
Info::
GitHub Pages: Hosted on Azure/GitHub with Microsoft carbon-negative commitment
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 GitHub Pages✓CDN GitHub Pages✓

GitHub Pages: Verified by the Green Web Foundation

GitHub Pages: Hosted on Azure/GitHub with Microsoft carbon-negative commitment

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 9 KB (vs 502 KB first visit). 50 of 52 resources are served from browser cache, saving 0.11g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.12g)
First visit
502 KB
Repeat visit
9 KB

98% reduction on repeat visits

Saving 0.11g CO2 per returning visitor

50 resources served from cache · 2 resources re-downloaded

A+
Carbon Budget
10th percentile
PASS
10th percentile
Info::
0.12g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.12g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 81% cleaner ✓
vs Target 77% cleaner ✓
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Fastly

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

Send Feedback