https://www.roseninns.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
DCO2 Per Page LoadAction1.18g CO2 per viewFIX
CO2 Per Page Load
Action1.18g CO2 per view
1.18g CO2 per view
Warning::
1.18g CO2 per page view
This page transfers 4.2 MB, producing an estimated 1.18g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.22g, network 0.20g, end-user device 0.76g.
Got: 1.18g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 142.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 142.0 kg of CO2 annually — equivalent to charging 17745 smartphones.
1.18g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 34% of websites
Sustainable Web Design model v4 · Page size: 4.2 MB
Your site
1.18g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.22g
Network
0.20g
End-user device
0.76g
At 10,000 monthly views: Monthly: 11.8 kg · Annual: 142.0 kg · ≈ 17745 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::
AWS: Renewable energy varies by region; committed to 100% by 2025
Info::
AWS CloudFront: Renewable varies by edge location
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 AWS✗CDN AWS CloudFront✗
AWS: Renewable energy varies by region; committed to 100% by 2025
AWS CloudFront: Renewable varies by edge location
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction66th percentileFIX
Carbon Budget
Action66th percentile
66th percentile
Warning::
1.18g CO2 — above the median website (0.60g)
Heavier than an estimated 34% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 66th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.18g
66th percentile
Cleaner than 34% of websites
✗ Above the median website
vs Median 97% more
vs Target 137% more
BTransfer Efficiency86% efficientREVIEW
Transfer Efficiency
86% efficient
86% efficient
Info::
Transfer efficiency: 86%
An estimated 597 KB (14%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 597 KB of unused JavaScript. This wasted data produces 0.17g of unnecessary CO2 per page view.
Total waste: 597 KB (14% of page weight)
Unused JS 597 KB
0.17g unnecessary CO2 per visit
Actual transfer 4277 KB
Theoretical minimum 3680 KB
Potential savings 597 KB (0.17g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction8 font weights loaded across 4 famil(y/ies)REVIEW
Web Font Weight Variants
Action8 font weights loaded across 4 famil(y/ies)
8 font weights loaded across 4 famil(y/ies)
Warning::
8 font weights loaded -- likely 100+ KB of unused payload
Loading 8 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Lato, Montserrat, Poppins, Sorts Mill Goudy.
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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 24 KB (vs 4277 KB first visit). 87 of 88 resources are served from browser cache, saving 1.18g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.18g)
First visit
4277 KB
Repeat visit
24 KB
99% reduction on repeat visits
Saving 1.18g CO2 per returning visitor
87 resources served from cache · 1 resources re-downloaded
Image Optimization37 images, 0 KB total, 0 KB wastedINFO
Image Optimization
37 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
37
Total Size
0 KB
Oversized
3
8 missing alt text 36 missing dimensions 14 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.