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https://cynosurelutronic.com

Sustainability

· 7 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
3
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
7
2 PASS 3 REVIEW 2 FIX
F
CO2 Per Page Load
Action
1.77g CO2 per view
FIX
1.77g CO2 per view
Warning::
1.77g CO2 per page view
This page transfers 7.5 MB, producing an estimated 1.77g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.37g, end-user device 1.36g.
Got: 1.77g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 212.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 212.2 kg of CO2 annually — equivalent to charging 26519 smartphones.
Info::
Green hosting reduces data center emissions

1.77g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 17% of websites

Sustainable Web Design model v4 · Page size: 7.5 MB

Your site
1.77g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.37g
End-user device
1.36g
At 10,000 monthly views: Monthly: 17.7 kg · Annual: 212.2 kg · ≈ 26519 smartphone charges
F
Carbon Budget
Action
83th percentile
FIX
83th percentile
Warning::
1.77g CO2 — above the median website (0.60g)
Heavier than an estimated 17% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 83th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.77g

83rd percentile

Cleaner than 17% of websites

✗ Above the median website

vs Median 195% more
vs Target 254% more
B
Transfer Efficiency
87% efficient
REVIEW
87% efficient
Info::
Transfer efficiency: 87%
An estimated 1030 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1030 KB of unused JavaScript. This wasted data produces 0.24g of unnecessary CO2 per page view.
87% efficient

Total waste: 1030 KB (13% of page weight)

Unused JS 1030 KB

0.24g unnecessary CO2 per visit

Actual transfer 7648 KB
Theoretical minimum 6618 KB
Potential savings 1030 KB (0.24g CO2)

See Deep Analysis sections above for specific optimizations.

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 GoDaddy✗CDN Cloudflare✓

Cloudflare: 100% renewable energy for global network since 2019

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 7648 KB first visit). 134 of 137 resources are served from browser cache, saving 1.76g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.77g)
First visit
7648 KB
Repeat visit
46 KB

99% reduction on repeat visits

Saving 1.76g CO2 per returning visitor

134 resources served from cache · 3 resources re-downloaded

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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