https://sika.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
66
GRADE
D
FIX
2
REVIEW
0
PASS
4
INFO
0
Checks
64 PASS 2 FIX
FCO2 Per Page LoadAction3.85g CO2 per viewFIX
CO2 Per Page Load
Action3.85g CO2 per view
3.85g CO2 per view
Critical::
3.85g CO2 per page view
This page transfers 16.3 MB, producing an estimated 3.85g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.80g, end-user device 2.96g.
Got: 3.85g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 461.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 461.8 kg of CO2 annually — equivalent to charging 57723 smartphones.
Info::
Green hosting reduces data center emissions
3.85g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 16.3 MB
Your site
3.85g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.10g
Network
0.80g
End-user device
2.96g
At 10,000 monthly views: Monthly: 38.5 kg · Annual: 461.8 kg · ≈ 57723 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.85g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
3.85g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 541% more
vs Target 670% more
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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 23 KB (vs 16648 KB first visit). 72 of 75 resources are served from browser cache, saving 3.84g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 3.85g)
First visit
16648 KB
Repeat visit
23 KB
100% reduction on repeat visits
Saving 3.84g CO2 per returning visitor
72 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 16648 KB
Theoretical minimum 16648 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
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.