https://www.pdn.ac.lk
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
60
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction29.01g CO2 per viewFIX
CO2 Per Page Load
Action29.01g CO2 per view
29.01g CO2 per view
Critical::
29.01g CO2 per page view
This page transfers 102.4 MB, producing an estimated 29.01g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 5.37g, network 5.01g, end-user device 18.63g.
Got: 29.01g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 3481.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 3481.6 kg of CO2 annually — equivalent to charging 435200 smartphones.
29.01g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 102.4 MB
Your site
29.01g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
5.37g
Network
5.01g
End-user device
18.63g
At 10,000 monthly views: Monthly: 290.1 kg · Annual: 3481.6 kg · ≈ 435200 smartphone charges
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 Apache HTTP Server✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
29.01g 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
29.01g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 4736% more
vs Target 5703% 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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 241 KB (vs 104907 KB first visit). 125 of 130 resources are served from browser cache, saving 28.95g CO2 per repeat visit.
Info::
Repeat visit: 0.07g CO2 (first visit: 29.01g)
First visit
104907 KB
Repeat visit
241 KB
100% reduction on repeat visits
Saving 28.95g CO2 per returning visitor
125 resources served from cache · 5 resources re-downloaded
A+Transfer Efficiency91% efficientPASS
Transfer Efficiency
91% efficient
91% efficient
Info::
Transfer efficiency: 91%
Only 9484 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 9484 KB (9% of page weight)
Unused JS 9484 KB
2.62g unnecessary CO2 per visit
Actual transfer 104907 KB
Theoretical minimum 95422 KB
Potential savings 9484 KB (2.62g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization34 images, 14779 KB total, 10511 KB wastedINFO
Image Optimization
34 images, 14779 KB total, 10511 KB wasted
Image Optimization Audit
Total Images
34
Total Size
14779 KB
Oversized
17
Wasted
10511 KB
33 missing dimensions 27 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.