https://improvingliteracy.org/resource/understanding-the-new-ida-dyslexia-definition/
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
81
GRADE
B
FIX
0
REVIEW
4
PASS
3
INFO
1
Checks
83 PASS 4 REVIEW
BCO2 Per Page Load0.60g CO2 per viewREVIEW
CO2 Per Page Load
0.60g CO2 per view
0.60g CO2 per view
Info::
0.60g CO2 per page view
This page transfers 2.5 MB, producing an estimated 0.60g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.12g, end-user device 0.46g.
Got: 0.60g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 71.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 71.6 kg of CO2 annually — equivalent to charging 8945 smartphones.
Info::
Green hosting reduces data center emissions
0.60g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 51% of websites
Sustainable Web Design model v4 · Page size: 2.5 MB
Your site
0.60g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.12g
End-user device
0.46g
At 10,000 monthly views: Monthly: 6.0 kg · Annual: 71.6 kg · ≈ 8945 smartphone charges
BCarbon Budget49th percentileREVIEW
Carbon Budget
49th percentile
49th percentile
Info::
0.60g CO2 — below the median website (0.60g)
Better than an estimated 51% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 49th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.60g
49th percentile
Cleaner than 51% of websites
✗ Above the median website
vs Median 1% cleaner ✓
vs Target 19% more
CTransfer EfficiencyAction67% efficientREVIEW
Transfer Efficiency
Action67% efficient
67% efficient
Warning::
Transfer efficiency: 67%
An estimated 849 KB (33%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 849 KB of unused JavaScript. This wasted data produces 0.20g of unnecessary CO2 per page view.
Total waste: 849 KB (33% of page weight)
Unused JS 849 KB
0.20g unnecessary CO2 per visit
Actual transfer 2580 KB
Theoretical minimum 1730 KB
Potential savings 849 KB (0.20g CO2)
See Deep Analysis sections above for specific optimizations.
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.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Kinsta, CDN: Cloudflare
Info::
Kinsta: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Kinsta✓CDN Cloudflare✓
Kinsta: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 52 KB (vs 2580 KB first visit). 55 of 58 resources are served from browser cache, saving 0.58g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.60g)
First visit
2580 KB
Repeat visit
52 KB
98% reduction on repeat visits
Saving 0.58g CO2 per returning visitor
55 resources served from cache · 3 resources re-downloaded
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Something Familiar
Image Optimization9 images, 945 KB total, 1 KB wastedINFO
Image Optimization
9 images, 945 KB total, 1 KB wasted
Image Optimization Audit
Total Images
9
Total Size
945 KB
Oversized
1
Wasted
1 KB
2 missing dimensions 5 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.