https://backmarket.it
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
93
GRADE
A
FIX
2
REVIEW
1
PASS
4
INFO
1
Checks
84 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction0.88g CO2 per viewFIX
CO2 Per Page Load
Action0.88g CO2 per view
0.88g CO2 per view
Info::
0.88g CO2 per page view
This page transfers 3.7 MB, producing an estimated 0.88g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.18g, end-user device 0.67g.
Got: 0.88g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 105.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 105.4 kg of CO2 annually — equivalent to charging 13170 smartphones.
Info::
Green hosting reduces data center emissions
0.88g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 43% of websites
Sustainable Web Design model v4 · Page size: 3.7 MB
Your site
0.88g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.18g
End-user device
0.67g
At 10,000 monthly views: Monthly: 8.8 kg · Annual: 105.4 kg · ≈ 13170 smartphone charges
DCarbon BudgetAction57th percentileFIX
Carbon Budget
Action57th percentile
57th percentile
Warning::
0.88g CO2 — above the median website (0.60g)
Heavier than an estimated 43% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 57th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.88g
57th percentile
Cleaner than 43% of websites
✗ Above the median website
vs Median 46% more
vs Target 76% 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 Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 217 KB (vs 3798 KB first visit). 148 of 151 resources are served from browser cache, saving 0.83g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 0.88g)
First visit
3798 KB
Repeat visit
217 KB
94% reduction on repeat visits
Saving 0.83g CO2 per returning visitor
148 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency100% efficientPASS
Transfer Efficiency
100% efficient
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
Actual transfer 3798 KB
Theoretical minimum 3798 KB
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 Optimization151 images, 288 KB total, 23 KB wastedINFO
Image Optimization
151 images, 288 KB total, 23 KB wasted
Image Optimization Audit
Total Images
151
Total Size
288 KB
Oversized
9
Wasted
23 KB
28 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.