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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
D
CO2 Per Page Load
Action
1.49g CO2 per view
FIX
1.49g CO2 per view
Warning::
1.49g CO2 per page view
This page transfers 6.3 MB, producing an estimated 1.49g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.31g, end-user device 1.15g.
Got: 1.49g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 179.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 179.2 kg of CO2 annually — equivalent to charging 22398 smartphones.
Info::
Green hosting reduces data center emissions

1.49g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 25% of websites

Sustainable Web Design model v4 · Page size: 6.3 MB

Your site
1.49g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.31g
End-user device
1.15g
At 10,000 monthly views: Monthly: 14.9 kg · Annual: 179.2 kg · ≈ 22398 smartphone charges
F
Carbon Budget
Action
75th percentile
FIX
75th percentile
Warning::
1.49g CO2 — above the median website (0.60g)
Heavier than an estimated 25% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 75th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.49g

75th percentile

Cleaner than 25% of websites

✗ Above the median website

vs Median 149% more
vs Target 199% 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
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 69 KB (vs 6460 KB first visit). 74 of 75 resources are served from browser cache, saving 1.48g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.49g)
First visit
6460 KB
Repeat visit
69 KB

99% reduction on repeat visits

Saving 1.48g CO2 per returning visitor

74 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
96% efficient
PASS
96% efficient
Info::
Transfer efficiency: 96%
Only 263 KB of potential savings identified. Your page is well-optimized for size.
96% efficient

Total waste: 263 KB (4% of page weight)

Unused JS 263 KB

0.06g unnecessary CO2 per visit

Actual transfer 6460 KB
Theoretical minimum 6196 KB
Potential savings 263 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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