https://bolbala.in
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
70
GRADE
C
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
DCO2 Per Page LoadAction1.27g CO2 per viewFIX
CO2 Per Page Load
Action1.27g CO2 per view
1.27g CO2 per view
Warning::
1.27g CO2 per page view
This page transfers 4.5 MB, producing an estimated 1.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.24g, network 0.22g, end-user device 0.82g.
Got: 1.27g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 152.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 152.4 kg of CO2 annually — equivalent to charging 19053 smartphones.
1.27g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 31% of websites
Sustainable Web Design model v4 · Page size: 4.5 MB
Your site
1.27g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.24g
Network
0.22g
End-user device
0.82g
At 10,000 monthly views: Monthly: 12.7 kg · Annual: 152.4 kg · ≈ 19053 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
DCarbon BudgetAction69th percentileFIX
Carbon Budget
Action69th percentile
69th percentile
Warning::
1.27g CO2 — above the median website (0.60g)
Heavier than an estimated 31% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 69th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.27g
69th percentile
Cleaner than 31% of websites
✗ Above the median website
vs Median 112% more
vs Target 154% more
CWeb Font Weight VariantsAction55 font weights loaded across 4 famil(y/ies)REVIEW
Web Font Weight Variants
Action55 font weights loaded across 4 famil(y/ies)
55 font weights loaded across 4 famil(y/ies)
Warning::
55 font weights loaded -- likely 100+ KB of unused payload
Loading 55 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Bebas Neue, Lora, Roboto, Roboto Slab.
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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 30 KB (vs 4593 KB first visit). 100 of 101 resources are served from browser cache, saving 1.26g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.27g)
First visit
4593 KB
Repeat visit
30 KB
99% reduction on repeat visits
Saving 1.26g CO2 per returning visitor
100 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 59 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 59 KB (1% of page weight)
Unused JS 59 KB
0.02g unnecessary CO2 per visit
Actual transfer 4593 KB
Theoretical minimum 4533 KB
Potential savings 59 KB (0.02g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization86 images, 1449 KB total, 243 KB wastedINFO
Image Optimization
86 images, 1449 KB total, 243 KB wasted
Image Optimization Audit
Total Images
86
Total Size
1449 KB
Oversized
7
Wasted
243 KB
3 missing dimensions 7 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.