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https://www.kingkerosin.com

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
79
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Device:
Mobile Desktop
Checks
8
3 PASS 2 REVIEW 2 FIX
D
CO2 Per Page Load
Action
1.17g CO2 per view
FIX
1.17g CO2 per view
Warning::
1.17g CO2 per page view
This page transfers 5.0 MB, producing an estimated 1.17g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.24g, end-user device 0.90g.
Got: 1.17g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 140.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 140.9 kg of CO2 annually — equivalent to charging 17617 smartphones.
Info::
Green hosting reduces data center emissions

1.17g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 34% of websites

Sustainable Web Design model v4 · Page size: 5.0 MB

Your site
1.17g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.03g
Network
0.24g
End-user device
0.90g
At 10,000 monthly views: Monthly: 11.7 kg · Annual: 140.9 kg · ≈ 17617 smartphone charges
D
Carbon Budget
Action
66th percentile
FIX
66th percentile
Warning::
1.17g CO2 — above the median website (0.60g)
Heavier than an estimated 34% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 66th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.17g

66th percentile

Cleaner than 34% of websites

✗ Above the median website

vs Median 96% more
vs Target 135% more
B
Web Font Weight Variants
No detectable Google Fonts weights
REVIEW
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Green Hosting
Green (cdn)
PASS
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
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 Amazon Web Services✗CDN Cloudflare✓

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 122 KB (vs 5081 KB first visit). 505 of 510 resources are served from browser cache, saving 1.15g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.17g)
First visit
5081 KB
Repeat visit
122 KB

98% reduction on repeat visits

Saving 1.15g CO2 per returning visitor

505 resources served from cache · 5 resources re-downloaded

A+
Transfer Efficiency
90% efficient
PASS
90% efficient
Info::
Transfer efficiency: 90%
Only 498 KB of potential savings identified. Your page is well-optimized for size.
90% efficient

Total waste: 498 KB (10% of page weight)

Unused JS 498 KB

0.12g unnecessary CO2 per visit

Actual transfer 5081 KB
Theoretical minimum 4582 KB
Potential savings 498 KB (0.12g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization
200 images, 719 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

200

Total Size

719 KB

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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