https://passionfish.com.au
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
78
GRADE
C
FIX
1
REVIEW
4
PASS
2
INFO
1
Checks
82 PASS 4 REVIEW 1 FIX
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
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 Snowplow Analytics✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCO2 Per Page Load0.52g CO2 per viewREVIEW
CO2 Per Page Load
0.52g CO2 per view
0.52g CO2 per view
Info::
0.52g CO2 per page view
This page transfers 1.8 MB, producing an estimated 0.52g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.09g, end-user device 0.33g.
Got: 0.52g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 62.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 62.6 kg of CO2 annually — equivalent to charging 7821 smartphones.
0.52g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 58% of websites
Sustainable Web Design model v4 · Page size: 1.8 MB
Your site
0.52g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.10g
Network
0.09g
End-user device
0.33g
At 10,000 monthly views: Monthly: 5.2 kg · Annual: 62.6 kg · ≈ 7821 smartphone charges
BCarbon Budget42th percentileREVIEW
Carbon Budget
42th percentile
42th percentile
Info::
0.52g CO2 — below the median website (0.60g)
Better than an estimated 58% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 42th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.52g
42nd percentile
Cleaner than 58% of websites
✗ Above the median website
vs Median 13% cleaner ✓
vs Target 4% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 31 KB (vs 1885 KB first visit). 81 of 82 resources are served from browser cache, saving 0.51g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.52g)
First visit
1885 KB
Repeat visit
31 KB
98% reduction on repeat visits
Saving 0.51g CO2 per returning visitor
81 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency93% efficientPASS
Transfer Efficiency
93% efficient
93% efficient
Info::
Transfer efficiency: 93%
Only 137 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 137 KB (7% of page weight)
Unused JS 137 KB
0.04g unnecessary CO2 per visit
Actual transfer 1885 KB
Theoretical minimum 1747 KB
Potential savings 137 KB (0.04g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization13 images, 0 KB total, 0 KB wastedINFO
Image Optimization
13 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
13
Total Size
0 KB
Oversized
1
7 missing alt text 9 missing dimensions 12 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.