https://www.trenzobd.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
78
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.18g CO2 per viewFIX
CO2 Per Page Load
Action1.18g CO2 per view
1.18g CO2 per view
Warning::
1.18g CO2 per page view
This page transfers 5.0 MB, producing an estimated 1.18g 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: 1.18g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 141.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 141.2 kg of CO2 annually — equivalent to charging 17647 smartphones.
Info::
Green hosting reduces data center emissions
1.18g
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
1.18g
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: 11.8 kg · Annual: 141.2 kg · ≈ 17647 smartphone charges
DCarbon BudgetAction66th percentileFIX
Carbon Budget
Action66th percentile
66th percentile
Warning::
1.18g 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
1.18g
66th percentile
Cleaner than 34% of websites
✗ Above the median website
vs Median 96% more
vs Target 135% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Amazon Web Services uses renewable energy
Info::
Amazon Web Services: 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 Amazon Web Services✓CDN Not identified✗
Amazon Web Services: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
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.
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 36 KB (vs 5089 KB first visit). 96 of 98 resources are served from browser cache, saving 1.17g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.18g)
First visit
5089 KB
Repeat visit
36 KB
99% reduction on repeat visits
Saving 1.17g CO2 per returning visitor
96 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency91% efficientPASS
Transfer Efficiency
91% efficient
91% efficient
Info::
Transfer efficiency: 91%
Only 433 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 433 KB (9% of page weight)
Unused JS 433 KB
0.10g unnecessary CO2 per visit
Actual transfer 5089 KB
Theoretical minimum 4656 KB
Potential savings 433 KB (0.10g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Hostinger
Image Optimization34 images, 1280 KB total, 1156 KB wastedINFO
Image Optimization
34 images, 1280 KB total, 1156 KB wasted
Image Optimization Audit
Total Images
34
Total Size
1280 KB
Oversized
1
Wasted
1156 KB
25 missing dimensions 5 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.