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https://www.hoskingdesign.com.au

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
66
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.59g CO2 per view
FIX
1.59g CO2 per view
Warning::
1.59g CO2 per page view
This page transfers 5.6 MB, producing an estimated 1.59g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.30g, network 0.28g, end-user device 1.02g.
Got: 1.59g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 191.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 191.2 kg of CO2 annually — equivalent to charging 23899 smartphones.

1.59g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 22% of websites

Sustainable Web Design model v4 · Page size: 5.6 MB

Your site
1.59g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.30g
Network
0.28g
End-user device
1.02g
At 10,000 monthly views: Monthly: 15.9 kg · Annual: 191.2 kg · ≈ 23899 smartphone charges
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
78th percentile
FIX
78th percentile
Warning::
1.59g CO2 — above the median website (0.60g)
Heavier than an estimated 22% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 78th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.59g

78th percentile

Cleaner than 22% of websites

✗ Above the median website

vs Median 166% more
vs Target 219% more
B
Web Font Weight Variants
No detectable Google Fonts weights
REVIEW
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.
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 35 KB (vs 5761 KB first visit). 72 of 73 resources are served from browser cache, saving 1.58g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.59g)
First visit
5761 KB
Repeat visit
35 KB

99% reduction on repeat visits

Saving 1.58g CO2 per returning visitor

72 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
92% efficient
PASS
92% efficient
Info::
Transfer efficiency: 92%
Only 468 KB of potential savings identified. Your page is well-optimized for size.
92% efficient

Total waste: 468 KB (8% of page weight)

Unused JS 468 KB

0.13g unnecessary CO2 per visit

Actual transfer 5761 KB
Theoretical minimum 5292 KB
Potential savings 468 KB (0.13g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization
22 images, 227 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

22

Total Size

227 KB

2 missing alt text 11 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.

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