https://atl30309.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
74
GRADE
C
FIX
2
REVIEW
3
PASS
2
INFO
1
Checks
82 PASS 3 REVIEW 2 FIX
DCarbon BudgetAction51th percentileFIX
Carbon Budget
Action51th percentile
51th percentile
Warning::
0.66g CO2 — above the median website (0.60g)
Heavier than an estimated 49% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 51th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.66g
51st percentile
Cleaner than 49% of websites
✗ Above the median website
vs Median 10% more
vs Target 32% more
DTransfer EfficiencyAction56% efficientFIX
Transfer Efficiency
Action56% efficient
56% efficient
Warning::
Transfer efficiency: 56%
An estimated 1252 KB (44%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1252 KB of unused JavaScript. This wasted data produces 0.29g of unnecessary CO2 per page view.
Total waste: 1252 KB (44% of page weight)
Unused JS 1252 KB
0.29g unnecessary CO2 per visit
Actual transfer 2847 KB
Theoretical minimum 1594 KB
Potential savings 1252 KB (0.29g CO2)
See Deep Analysis sections above for specific optimizations.
BCO2 Per Page Load0.66g CO2 per viewREVIEW
CO2 Per Page Load
0.66g CO2 per view
0.66g CO2 per view
Info::
0.66g CO2 per page view
This page transfers 2.8 MB, producing an estimated 0.66g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.14g, end-user device 0.51g.
Got: 0.66g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 79.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 79.0 kg of CO2 annually — equivalent to charging 9871 smartphones.
Info::
Green hosting reduces data center emissions
0.66g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 49% of websites
Sustainable Web Design model v4 · Page size: 2.8 MB
Your site
0.66g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.14g
End-user device
0.51g
At 10,000 monthly views: Monthly: 6.6 kg · Annual: 79.0 kg · ≈ 9871 smartphone charges
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Hetzner Online GmbH uses renewable energy
Info::
Hetzner Online GmbH: Verified by the Green Web Foundation
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 Hetzner Online GmbH✓CDN Not identified✗
Hetzner Online GmbH: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
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+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 1 KB (vs 2847 KB first visit). 49 of 50 resources are served from browser cache, saving 0.66g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.66g)
First visit
2847 KB
Repeat visit
1 KB
100% reduction on repeat visits
Saving 0.66g CO2 per returning visitor
49 resources served from cache · 1 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: Hetzner Online GmbH
Image Optimization6 images, 3 KB total, 0 KB wastedINFO
Image Optimization
6 images, 3 KB total, 0 KB wasted
Image Optimization Audit
Total Images
6
Total Size
3 KB
6 missing alt text
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.