https://worldscientific.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
76
GRADE
C
FIX
2
REVIEW
0
PASS
4
INFO
0
Checks
64 PASS 2 FIX
DCO2 Per Page LoadAction1.46g CO2 per viewFIX
CO2 Per Page Load
Action1.46g CO2 per view
1.46g CO2 per view
Warning::
1.46g CO2 per page view
This page transfers 6.2 MB, producing an estimated 1.46g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.30g, end-user device 1.12g.
Got: 1.46g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 175.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 175.2 kg of CO2 annually — equivalent to charging 21906 smartphones.
Info::
Green hosting reduces data center emissions
1.46g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 26% of websites
Sustainable Web Design model v4 · Page size: 6.2 MB
Your site
1.46g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.30g
End-user device
1.12g
At 10,000 monthly views: Monthly: 14.6 kg · Annual: 175.2 kg · ≈ 21906 smartphone charges
FCarbon BudgetAction74th percentileFIX
Carbon Budget
Action74th percentile
74th percentile
Warning::
1.46g CO2 — above the median website (0.60g)
Heavier than an estimated 26% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 74th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.46g
74th percentile
Cleaner than 26% of websites
✗ Above the median website
vs Median 143% more
vs Target 192% 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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 55 KB (vs 6318 KB first visit). 214 of 217 resources are served from browser cache, saving 1.45g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.46g)
First visit
6318 KB
Repeat visit
55 KB
99% reduction on repeat visits
Saving 1.45g CO2 per returning visitor
214 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency93% efficientPASS
Transfer Efficiency
93% efficient
93% efficient
Info::
Transfer efficiency: 93%
Only 442 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 442 KB (7% of page weight)
Unused JS 442 KB
0.10g unnecessary CO2 per visit
Actual transfer 6318 KB
Theoretical minimum 5876 KB
Potential savings 442 KB (0.10g 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: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.