https://bangbros.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
65
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
DCO2 Per Page LoadAction1.50g CO2 per viewFIX
CO2 Per Page Load
Action1.50g CO2 per view
1.50g CO2 per view
Warning::
1.50g CO2 per page view
This page transfers 5.3 MB, producing an estimated 1.50g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.28g, network 0.26g, end-user device 0.96g.
Got: 1.50g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 179.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 179.6 kg of CO2 annually — equivalent to charging 22455 smartphones.
1.50g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 25% of websites
Sustainable Web Design model v4 · Page size: 5.3 MB
Your site
1.50g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.28g
Network
0.26g
End-user device
0.96g
At 10,000 monthly views: Monthly: 15.0 kg · Annual: 179.6 kg · ≈ 22455 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 BudgetAction75th percentileFIX
Carbon Budget
Action75th percentile
75th percentile
Warning::
1.50g CO2 — above the median website (0.60g)
Heavier than an estimated 25% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 75th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.50g
75th percentile
Cleaner than 25% of websites
✗ Above the median website
vs Median 150% more
vs Target 199% more
CTransfer EfficiencyAction75% efficientREVIEW
Transfer Efficiency
Action75% efficient
75% efficient
Warning::
Transfer efficiency: 75%
An estimated 1369 KB (25%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1369 KB of unused JavaScript. This wasted data produces 0.38g of unnecessary CO2 per page view.
Total waste: 1369 KB (25% of page weight)
Unused JS 1369 KB
0.38g unnecessary CO2 per visit
Actual transfer 5412 KB
Theoretical minimum 4043 KB
Potential savings 1369 KB (0.38g 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 116 KB (vs 5412 KB first visit). 104 of 106 resources are served from browser cache, saving 1.46g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.50g)
First visit
5412 KB
Repeat visit
116 KB
98% reduction on repeat visits
Saving 1.46g CO2 per returning visitor
104 resources served from cache · 2 resources re-downloaded
A+Web Font Weight Variants2 font weights loaded across 2 famil(y/ies) -- reasonablePASS
Web Font Weight Variants
2 font weights loaded across 2 famil(y/ies) -- reasonable
2 font weights loaded across 2 famil(y/ies) -- reasonable
Info::
2 font weight(s) loaded across 2 famil(y/ies)
Image Optimization12 images, 0 KB total, 0 KB wastedINFO
Image Optimization
12 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
12
Total Size
0 KB
Oversized
6
12 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.