https://starwoodhotels.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
62
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction6.90g CO2 per viewFIX
CO2 Per Page Load
Action6.90g CO2 per view
6.90g CO2 per view
Critical::
6.90g CO2 per page view
This page transfers 29.1 MB, producing an estimated 6.90g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.17g, network 1.43g, end-user device 5.30g.
Got: 6.90g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 827.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 827.5 kg of CO2 annually — equivalent to charging 103441 smartphones.
Info::
Green hosting reduces data center emissions
6.90g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 29.1 MB
Your site
6.90g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.17g
Network
1.43g
End-user device
5.30g
At 10,000 monthly views: Monthly: 69.0 kg · Annual: 827.5 kg · ≈ 103441 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
6.90g 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
6.90g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 1049% more
vs Target 1279% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Apache HTTP Server uses renewable energy
Info::
Apache HTTP Server: 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 Apache HTTP Server✓CDN Not identified✗
Apache HTTP Server: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 63 KB (vs 29835 KB first visit). 228 of 229 resources are served from browser cache, saving 6.88g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 6.90g)
First visit
29835 KB
Repeat visit
63 KB
100% reduction on repeat visits
Saving 6.88g CO2 per returning visitor
228 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency98% efficientPASS
Transfer Efficiency
98% efficient
98% efficient
Info::
Transfer efficiency: 98%
Only 607 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 607 KB (2% of page weight)
Unused JS 607 KB
0.14g unnecessary CO2 per visit
Actual transfer 29835 KB
Theoretical minimum 29227 KB
Potential savings 607 KB (0.14g CO2)
See Deep Analysis sections above for specific optimizations.
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: OVHcloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.