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https://brooklinen.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
66
GRADE
D
FIX
2
REVIEW
0
PASS
4
INFO
0
Device:
Mobile Desktop
Checks
6
4 PASS 2 FIX
F
CO2 Per Page Load
Action
6.24g CO2 per view
FIX
6.24g CO2 per view
Critical::
6.24g CO2 per page view
This page transfers 26.4 MB, producing an estimated 6.24g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.16g, network 1.29g, end-user device 4.79g.
Got: 6.24g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 748.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 748.9 kg of CO2 annually — equivalent to charging 93611 smartphones.
Info::
Green hosting reduces data center emissions

6.24g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 26.4 MB

Your site
6.24g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.16g
Network
1.29g
End-user device
4.79g
At 10,000 monthly views: Monthly: 62.4 kg · Annual: 748.9 kg · ≈ 93611 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
6.24g 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

6.24g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 940% more
vs Target 1148% more
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Amazon Web Services, CDN: Cloudflare
Info::
Amazon Web Services: Verified by the Green Web Foundation
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 Amazon Web Services✓CDN Cloudflare✓

Amazon Web Services: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 774 KB (vs 26999 KB first visit). 696 of 722 resources are served from browser cache, saving 6.06g CO2 per repeat visit.
Info::
Repeat visit: 0.18g CO2 (first visit: 6.24g)
First visit
26999 KB
Repeat visit
774 KB

97% reduction on repeat visits

Saving 6.06g CO2 per returning visitor

696 resources served from cache · 26 resources re-downloaded

A+
Transfer Efficiency
95% efficient
PASS
95% efficient
Info::
Transfer efficiency: 95%
Only 1427 KB of potential savings identified. Your page is well-optimized for size.
95% efficient

Total waste: 1427 KB (5% of page weight)

Unused JS 1427 KB

0.33g unnecessary CO2 per visit

Actual transfer 26999 KB
Theoretical minimum 25571 KB
Potential savings 1427 KB (0.33g 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: Cloudflare

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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