https://yourstory.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
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction1.49g CO2 per viewFIX
CO2 Per Page Load
Action1.49g CO2 per view
1.49g CO2 per view
Warning::
1.49g CO2 per page view
This page transfers 6.3 MB, producing an estimated 1.49g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.31g, end-user device 1.14g.
Got: 1.49g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 178.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 178.4 kg of CO2 annually — equivalent to charging 22303 smartphones.
Info::
Green hosting reduces data center emissions
1.49g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 25% of websites
Sustainable Web Design model v4 · Page size: 6.3 MB
Your site
1.49g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.31g
End-user device
1.14g
At 10,000 monthly views: Monthly: 14.9 kg · Annual: 178.4 kg · ≈ 22303 smartphone charges
FCarbon BudgetAction75th percentileFIX
Carbon Budget
Action75th percentile
75th percentile
Warning::
1.49g 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
1.49g
75th percentile
Cleaner than 25% of websites
✗ Above the median website
vs Median 148% more
vs Target 197% more
BTransfer Efficiency87% efficientREVIEW
Transfer Efficiency
87% efficient
87% efficient
Info::
Transfer efficiency: 87%
An estimated 856 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 856 KB of unused JavaScript. This wasted data produces 0.20g of unnecessary CO2 per page view.
Total waste: 856 KB (13% of page weight)
Unused JS 856 KB
0.20g unnecessary CO2 per visit
Actual transfer 6432 KB
Theoretical minimum 5576 KB
Potential savings 856 KB (0.20g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Next.js, CDN: Cloudflare
Info::
Next.js: 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 Next.js✓CDN Cloudflare✓
Next.js: 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 Weight92% cachedPASS
Repeat Visit Weight
92% cached
92% cached
Info::
92% reduction on repeat visits
Returning visitors download only 506 KB (vs 6432 KB first visit). 873 of 1047 resources are served from browser cache, saving 1.37g CO2 per repeat visit.
Info::
Repeat visit: 0.12g CO2 (first visit: 1.49g)
First visit
6432 KB
Repeat visit
506 KB
92% reduction on repeat visits
Saving 1.37g CO2 per returning visitor
873 resources served from cache · 174 resources re-downloaded
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.