https://wikihow.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
80
GRADE
B
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction0.84g CO2 per viewFIX
CO2 Per Page Load
Action0.84g CO2 per view
0.84g CO2 per view
Info::
0.84g CO2 per page view
This page transfers 3.5 MB, producing an estimated 0.84g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.17g, end-user device 0.64g.
Got: 0.84g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 100.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 100.7 kg of CO2 annually — equivalent to charging 12586 smartphones.
Info::
Green hosting reduces data center emissions
0.84g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 44% of websites
Sustainable Web Design model v4 · Page size: 3.5 MB
Your site
0.84g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.17g
End-user device
0.64g
At 10,000 monthly views: Monthly: 8.4 kg · Annual: 100.7 kg · ≈ 12586 smartphone charges
DCarbon BudgetAction56th percentileFIX
Carbon Budget
Action56th percentile
56th percentile
Warning::
0.84g CO2 — above the median website (0.60g)
Heavier than an estimated 44% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 56th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.84g
56th percentile
Cleaner than 44% of websites
✗ Above the median website
vs Median 40% more
vs Target 68% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Axis12 Ltd uses renewable energy
Info::
Axis12 Ltd: Verified by the Green Web Foundation
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 Axis12 Ltd✓CDN Not identified✗
Axis12 Ltd: Verified by the Green Web Foundation
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 74 KB (vs 3630 KB first visit). 165 of 167 resources are served from browser cache, saving 0.82g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.84g)
First visit
3630 KB
Repeat visit
74 KB
98% reduction on repeat visits
Saving 0.82g CO2 per returning visitor
165 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 273 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 273 KB (8% of page weight)
Unused JS 273 KB
0.06g unnecessary CO2 per visit
Actual transfer 3630 KB
Theoretical minimum 3356 KB
Potential savings 273 KB (0.06g 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: Axis12 Ltd
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.