https://www.lusciousleopard.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
67
GRADE
D
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction3.89g CO2 per viewFIX
CO2 Per Page Load
Action3.89g CO2 per view
3.89g CO2 per view
Critical::
3.89g CO2 per page view
This page transfers 16.4 MB, producing an estimated 3.89g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.80g, end-user device 2.99g.
Got: 3.89g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 466.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 466.8 kg of CO2 annually — equivalent to charging 58354 smartphones.
Info::
Green hosting reduces data center emissions
3.89g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 16.4 MB
Your site
3.89g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.10g
Network
0.80g
End-user device
2.99g
At 10,000 monthly views: Monthly: 38.9 kg · Annual: 466.8 kg · ≈ 58354 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.89g 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
3.89g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 548% more
vs Target 678% 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
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
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 Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 89 KB (vs 16831 KB first visit). 224 of 227 resources are served from browser cache, saving 3.87g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 3.89g)
First visit
16831 KB
Repeat visit
89 KB
99% reduction on repeat visits
Saving 3.87g CO2 per returning visitor
224 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 573 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 573 KB (3% of page weight)
Unused JS 573 KB
0.13g unnecessary CO2 per visit
Actual transfer 16831 KB
Theoretical minimum 16257 KB
Potential savings 573 KB (0.13g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization154 images, 2020 KB total, 355 KB wastedINFO
Image Optimization
154 images, 2020 KB total, 355 KB wasted
Image Optimization Audit
Total Images
154
Total Size
2020 KB
Oversized
22
Wasted
355 KB
3 missing alt text 14 missing dimensions 17 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.