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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
69
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
2.06g CO2 per view
FIX
2.06g CO2 per view
Critical::
2.06g CO2 per page view
This page transfers 8.7 MB, producing an estimated 2.06g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.43g, end-user device 1.58g.
Got: 2.06g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 246.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 246.7 kg of CO2 annually — equivalent to charging 30836 smartphones.
Info::
Green hosting reduces data center emissions

2.06g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 8.7 MB

Your site
2.06g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.05g
Network
0.43g
End-user device
1.58g
At 10,000 monthly views: Monthly: 20.6 kg · Annual: 246.7 kg · ≈ 30836 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.06g 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

2.06g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 243% more
vs Target 311% more
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Snowplow Analytics, CDN: Cloudflare
Info::
Snowplow Analytics: 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 Snowplow Analytics✓CDN Cloudflare✓

Snowplow Analytics: 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
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 386 KB (vs 8894 KB first visit). 783 of 806 resources are served from browser cache, saving 1.97g CO2 per repeat visit.
Info::
Repeat visit: 0.09g CO2 (first visit: 2.06g)
First visit
8894 KB
Repeat visit
386 KB

96% reduction on repeat visits

Saving 1.97g CO2 per returning visitor

783 resources served from cache · 23 resources re-downloaded

A+
Transfer Efficiency
92% efficient
PASS
92% efficient
Info::
Transfer efficiency: 92%
Only 683 KB of potential savings identified. Your page is well-optimized for size.
92% efficient

Total waste: 683 KB (8% of page weight)

Unused JS 683 KB

0.16g unnecessary CO2 per visit

Actual transfer 8894 KB
Theoretical minimum 8210 KB
Potential savings 683 KB (0.16g 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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