Skip to content
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
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
7.27g CO2 per view
FIX
7.27g CO2 per view
Critical::
7.27g CO2 per page view
This page transfers 30.7 MB, producing an estimated 7.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.18g, network 1.50g, end-user device 5.58g.
Got: 7.27g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 872.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 872.4 kg of CO2 annually — equivalent to charging 109055 smartphones.
Info::
Green hosting reduces data center emissions

7.27g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 30.7 MB

Your site
7.27g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.18g
Network
1.50g
End-user device
5.58g
At 10,000 monthly views: Monthly: 72.7 kg · Annual: 872.4 kg · ≈ 109055 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
7.27g 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

7.27g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 1112% more
vs Target 1354% more
B
Green Hosting
Green (hosting)
REVIEW
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 Weight
100% cached
PASS
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 62 KB (vs 31454 KB first visit). 241 of 242 resources are served from browser cache, saving 7.26g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 7.27g)
First visit
31454 KB
Repeat visit
62 KB

100% reduction on repeat visits

Saving 7.26g CO2 per returning visitor

241 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
98% efficient
PASS
98% efficient
Info::
Transfer efficiency: 98%
Only 590 KB of potential savings identified. Your page is well-optimized for size.
98% efficient

Total waste: 590 KB (2% of page weight)

Unused JS 590 KB

0.14g unnecessary CO2 per visit

Actual transfer 31454 KB
Theoretical minimum 30863 KB
Potential savings 590 KB (0.14g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

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.

Send Feedback