Skip to content
https://www.melbournepolytechnic.edu.au

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
70
GRADE
C
FIX
3
REVIEW
2
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 2 REVIEW 3 FIX
D
CO2 Per Page Load
Action
1.21g CO2 per view
FIX
1.21g CO2 per view
Warning::
1.21g CO2 per page view
This page transfers 4.3 MB, producing an estimated 1.21g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.22g, network 0.21g, end-user device 0.78g.
Got: 1.21g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 145.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 145.7 kg of CO2 annually — equivalent to charging 18210 smartphones.

1.21g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 33% of websites

Sustainable Web Design model v4 · Page size: 4.3 MB

Your site
1.21g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.22g
Network
0.21g
End-user device
0.78g
At 10,000 monthly views: Monthly: 12.1 kg · Annual: 145.7 kg · ≈ 18210 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::
Azure: Microsoft is carbon-negative; Azure renewable varies by region
Info::
Azure CDN: Inherits Azure regional renewable mix
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 Azure✗CDN Azure CDN✗

Azure: Microsoft is carbon-negative; Azure renewable varies by region

Azure CDN: Inherits Azure regional renewable mix

Based on known provider commitments. Verify at thegreenwebfoundation.org

D
Carbon Budget
Action
67th percentile
FIX
67th percentile
Warning::
1.21g CO2 — above the median website (0.60g)
Heavier than an estimated 33% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 67th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.21g

67th percentile

Cleaner than 33% of websites

✗ Above the median website

vs Median 102% more
vs Target 143% more
B
Transfer Efficiency
80% efficient
REVIEW
80% efficient
Info::
Transfer efficiency: 80%
An estimated 886 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 886 KB of unused JavaScript. This wasted data produces 0.25g of unnecessary CO2 per page view.
80% efficient

Total waste: 886 KB (20% of page weight)

Unused JS 886 KB

0.25g unnecessary CO2 per visit

Actual transfer 4389 KB
Theoretical minimum 3503 KB
Potential savings 886 KB (0.25g 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
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 27 KB (vs 4389 KB first visit). 99 of 102 resources are served from browser cache, saving 1.21g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.21g)
First visit
4389 KB
Repeat visit
27 KB

99% reduction on repeat visits

Saving 1.21g CO2 per returning visitor

99 resources served from cache · 3 resources re-downloaded

A+
Web Font Weight Variants
1 font weights loaded across 1 famil(y/ies) -- reasonable
PASS
1 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
1 font weight(s) loaded across 1 famil(y/ies)
Image Optimization
22 images, 45 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

22

Total Size

45 KB

11 missing dimensions 17 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback