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Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
64
GRADE
D
FIX
2
REVIEW
2
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 2 REVIEW 2 FIX
D
CO2 Per Page Load
Action
1.41g CO2 per view
FIX
1.41g CO2 per view
Warning::
1.41g CO2 per page view
This page transfers 5.9 MB, producing an estimated 1.41g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.29g, end-user device 1.08g.
Got: 1.41g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 169.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 169.0 kg of CO2 annually — equivalent to charging 21120 smartphones.
Info::
Green hosting reduces data center emissions

1.41g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 27% of websites

Sustainable Web Design model v4 · Page size: 5.9 MB

Your site
1.41g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.29g
End-user device
1.08g
At 10,000 monthly views: Monthly: 14.1 kg · Annual: 169.0 kg · ≈ 21120 smartphone charges
F
Carbon Budget
Action
73th percentile
FIX
73th percentile
Warning::
1.41g CO2 — above the median website (0.60g)
Heavier than an estimated 27% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 73th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.41g

73rd percentile

Cleaner than 27% of websites

✗ Above the median website

vs Median 135% more
vs Target 182% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Snowplow Analytics uses renewable energy
Info::
Snowplow Analytics: 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 Snowplow Analytics✓CDN Not identified✗

Snowplow Analytics: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

C
Transfer Efficiency
Action
65% efficient
REVIEW
65% efficient
Warning::
Transfer efficiency: 65%
An estimated 2102 KB (35%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2102 KB of unused JavaScript. This wasted data produces 0.49g of unnecessary CO2 per page view.
65% efficient

Total waste: 2102 KB (35% of page weight)

Unused JS 2102 KB

0.49g unnecessary CO2 per visit

Actual transfer 6091 KB
Theoretical minimum 3988 KB
Potential savings 2102 KB (0.49g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Repeat Visit Weight
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 213 KB (vs 6091 KB first visit). 298 of 312 resources are served from browser cache, saving 1.36g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 1.41g)
First visit
6091 KB
Repeat visit
213 KB

96% reduction on repeat visits

Saving 1.36g CO2 per returning visitor

298 resources served from cache · 14 resources re-downloaded

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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