https://carrera-toys.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
75
GRADE
C
FIX
2
REVIEW
1
PASS
4
INFO
1
Checks
84 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction1.79g CO2 per viewFIX
CO2 Per Page Load
Action1.79g CO2 per view
1.79g CO2 per view
Warning::
1.79g CO2 per page view
This page transfers 7.6 MB, producing an estimated 1.79g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.37g, end-user device 1.37g.
Got: 1.79g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 214.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 214.6 kg of CO2 annually — equivalent to charging 26824 smartphones.
Info::
Green hosting reduces data center emissions
1.79g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 17% of websites
Sustainable Web Design model v4 · Page size: 7.6 MB
Your site
1.79g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.37g
End-user device
1.37g
At 10,000 monthly views: Monthly: 17.9 kg · Annual: 214.6 kg · ≈ 26824 smartphone charges
FCarbon BudgetAction83th percentileFIX
Carbon Budget
Action83th percentile
83th percentile
Warning::
1.79g 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
1.79g
83rd percentile
Cleaner than 17% of websites
✗ Above the median website
vs Median 198% more
vs Target 258% more
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+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: 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 Cloudflare✓CDN Cloudflare✓
Cloudflare: 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 125 KB (vs 7736 KB first visit). 267 of 270 resources are served from browser cache, saving 1.76g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.79g)
First visit
7736 KB
Repeat visit
125 KB
98% reduction on repeat visits
Saving 1.76g CO2 per returning visitor
267 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 396 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 396 KB (5% of page weight)
Unused JS 396 KB
0.09g unnecessary CO2 per visit
Actual transfer 7736 KB
Theoretical minimum 7340 KB
Potential savings 396 KB (0.09g 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: Cloudflare
Image Optimization200 images, 277 KB total, 88 KB wastedINFO
Image Optimization
200 images, 277 KB total, 88 KB wasted
Image Optimization Audit
Total Images
200
Total Size
277 KB
Oversized
25
Wasted
88 KB
81 missing alt text 87 missing dimensions 61 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.