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https://snap.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
4.45g CO2 per view
FIX
4.45g CO2 per view
Critical::
4.45g CO2 per page view
This page transfers 18.8 MB, producing an estimated 4.45g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.11g, network 0.92g, end-user device 3.42g.
Got: 4.45g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 533.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 533.8 kg of CO2 annually — equivalent to charging 66723 smartphones.
Info::
Green hosting reduces data center emissions

4.45g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 18.8 MB

Your site
4.45g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.11g
Network
0.92g
End-user device
3.42g
At 10,000 monthly views: Monthly: 44.5 kg · Annual: 533.8 kg · ≈ 66723 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
4.45g 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

4.45g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 641% more
vs Target 790% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Express uses renewable energy
Info::
Express: 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 Express✓CDN Google Cloud CDN✗

Express: 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
100% cached
PASS
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 81 KB (vs 19244 KB first visit). 118 of 119 resources are served from browser cache, saving 4.43g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 4.45g)
First visit
19244 KB
Repeat visit
81 KB

100% reduction on repeat visits

Saving 4.43g CO2 per returning visitor

118 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
99% efficient
PASS
99% efficient
Info::
Transfer efficiency: 99%
Only 258 KB of potential savings identified. Your page is well-optimized for size.
99% efficient

Total waste: 258 KB (1% of page weight)

Unused JS 258 KB

0.06g unnecessary CO2 per visit

Actual transfer 19244 KB
Theoretical minimum 18986 KB
Potential savings 258 KB (0.06g 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.

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