Skip to content
https://amzn.to

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
84
GRADE
B
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
1.77g CO2 per view
FIX
1.77g CO2 per view
Warning::
1.77g CO2 per page view
This page transfers 7.5 MB, producing an estimated 1.77g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.37g, end-user device 1.36g.
Got: 1.77g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 212.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 212.3 kg of CO2 annually — equivalent to charging 26538 smartphones.
Info::
Green hosting reduces data center emissions

1.77g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 17% of websites

Sustainable Web Design model v4 · Page size: 7.5 MB

Your site
1.77g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.37g
End-user device
1.36g
At 10,000 monthly views: Monthly: 17.7 kg · Annual: 212.3 kg · ≈ 26538 smartphone charges
F
Carbon Budget
Action
83th percentile
FIX
83th percentile
Warning::
1.77g CO2 — above the median website (0.60g)
Heavier than an estimated 17% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 83th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.77g

83rd percentile

Cleaner than 17% of websites

✗ Above the median website

vs Median 195% more
vs Target 254% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: Verified by the Green Web Foundation
Info::
Google Cloud CDN: Inherits Google Cloud regional renewable mix
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 Google Cloud✓CDN Google Cloud CDN✗

Google Cloud: Verified by the Green Web Foundation

Google Cloud CDN: Inherits Google Cloud regional renewable mix

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 187 KB (vs 7654 KB first visit). 362 of 365 resources are served from browser cache, saving 1.73g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 1.77g)
First visit
7654 KB
Repeat visit
187 KB

98% reduction on repeat visits

Saving 1.73g CO2 per returning visitor

362 resources served from cache · 3 resources re-downloaded

A+
Transfer Efficiency
93% efficient
PASS
93% efficient
Info::
Transfer efficiency: 93%
Only 523 KB of potential savings identified. Your page is well-optimized for size.
93% efficient

Total waste: 523 KB (7% of page weight)

Unused JS 523 KB

0.12g unnecessary CO2 per visit

Actual transfer 7654 KB
Theoretical minimum 7131 KB
Potential savings 523 KB (0.12g 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: Google Cloud

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

Send Feedback