https://bangbros.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction1.56g CO2 per viewFIX
CO2 Per Page Load
Action1.56g CO2 per view
1.56g CO2 per view
Warning::
1.56g CO2 per page view
This page transfers 5.5 MB, producing an estimated 1.56g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.29g, network 0.27g, end-user device 1.00g.
Got: 1.56g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 186.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 186.9 kg of CO2 annually — equivalent to charging 23368 smartphones.
1.56g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 23% of websites
Sustainable Web Design model v4 · Page size: 5.5 MB
Your site
1.56g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.29g
Network
0.27g
End-user device
1.00g
At 10,000 monthly views: Monthly: 15.6 kg · Annual: 186.9 kg · ≈ 23368 smartphone charges
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction77th percentileFIX
Carbon Budget
Action77th percentile
77th percentile
Warning::
1.56g CO2 — above the median website (0.60g)
Heavier than an estimated 23% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 77th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.56g
77th percentile
Cleaner than 23% of websites
✗ Above the median website
vs Median 160% more
vs Target 212% more
CTransfer EfficiencyAction69% efficientREVIEW
Transfer Efficiency
Action69% efficient
69% efficient
Warning::
Transfer efficiency: 69%
An estimated 1741 KB (31%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1741 KB of unused JavaScript. This wasted data produces 0.48g of unnecessary CO2 per page view.
Total waste: 1741 KB (31% of page weight)
Unused JS 1741 KB
0.48g unnecessary CO2 per visit
Actual transfer 5633 KB
Theoretical minimum 3891 KB
Potential savings 1741 KB (0.48g CO2)
See Deep Analysis sections above for specific optimizations.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 144 KB (vs 5633 KB first visit). 115 of 118 resources are served from browser cache, saving 1.52g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 1.56g)
First visit
5633 KB
Repeat visit
144 KB
97% reduction on repeat visits
Saving 1.52g CO2 per returning visitor
115 resources served from cache · 3 resources re-downloaded
A+Web Font Weight Variants1 font weights loaded across 1 famil(y/ies) -- reasonablePASS
Web Font Weight Variants
1 font weights loaded across 1 famil(y/ies) -- reasonable
1 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
1 font weight(s) loaded across 1 famil(y/ies)
Image Optimization10 images, 0 KB total, 0 KB wastedINFO
Image Optimization
10 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
10
Total Size
0 KB
Oversized
4
10 missing dimensions 4 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.