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Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
73
GRADE
C
FIX
2
REVIEW
1
PASS
4
INFO
1
Device:
Mobile Desktop
Checks
8
4 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
1.93g CO2 per view
FIX
1.93g CO2 per view
Warning::
1.93g CO2 per page view
This page transfers 8.2 MB, producing an estimated 1.93g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.40g, end-user device 1.48g.
Got: 1.93g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 231.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 231.6 kg of CO2 annually — equivalent to charging 28946 smartphones.
Info::
Green hosting reduces data center emissions

1.93g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 13% of websites

Sustainable Web Design model v4 · Page size: 8.2 MB

Your site
1.93g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.05g
Network
0.40g
End-user device
1.48g
At 10,000 monthly views: Monthly: 19.3 kg · Annual: 231.6 kg · ≈ 28946 smartphone charges
F
Carbon Budget
Action
87th percentile
FIX
87th percentile
Warning::
1.93g CO2 — above the median website (0.60g)
Heavier than an estimated 13% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 87th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.93g

87th percentile

Cleaner than 13% of websites

✗ Above the median website

vs Median 222% more
vs Target 286% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Kualo uses renewable energy
Info::
Kualo: 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 Kualo✓CDN Not identified✗

Kualo: Verified by the Green Web Foundation

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 46 KB (vs 8348 KB first visit). 193 of 195 resources are served from browser cache, saving 1.92g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.93g)
First visit
8348 KB
Repeat visit
46 KB

99% reduction on repeat visits

Saving 1.92g CO2 per returning visitor

193 resources served from cache · 2 resources re-downloaded

A+
Transfer Efficiency
92% efficient
PASS
92% efficient
Info::
Transfer efficiency: 92%
Only 703 KB of potential savings identified. Your page is well-optimized for size.
92% efficient

Total waste: 703 KB (8% of page weight)

Unused JS 703 KB

0.16g unnecessary CO2 per visit

Actual transfer 8348 KB
Theoretical minimum 7645 KB
Potential savings 703 KB (0.16g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Web Font Weight Variants
1 font weights loaded across 1 famil(y/ies) -- reasonable
PASS
1 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
1 font weight(s) loaded across 1 famil(y/ies)
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Kualo

Image Optimization
16 images, 146 KB total, 51 KB wasted
INFO

Image Optimization Audit

Total Images

16

Total Size

146 KB

Oversized

7

Wasted

51 KB

12 missing dimensions 12 missing lazy loading
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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