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 LoadAction1.23g CO2 per viewFIX
CO2 Per Page Load
Action1.23g CO2 per view
1.23g CO2 per view
Warning::
1.23g CO2 per page view
This page transfers 5.2 MB, producing an estimated 1.23g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.25g, end-user device 0.94g.
Got: 1.23g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 147.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 147.2 kg of CO2 annually — equivalent to charging 18400 smartphones.
Info::
Green hosting reduces data center emissions
1.23g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 33% of websites
Sustainable Web Design model v4 · Page size: 5.2 MB
Your site
1.23g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.25g
End-user device
0.94g
At 10,000 monthly views: Monthly: 12.3 kg · Annual: 147.2 kg · ≈ 18400 smartphone charges
DCarbon BudgetAction67th percentileFIX
Carbon Budget
Action67th percentile
67th percentile
Warning::
1.23g CO2 — above the median website (0.60g)
Heavier than an estimated 33% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 67th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.23g
67th percentile
Cleaner than 33% of websites
✗ Above the median website
vs Median 104% more
vs Target 145% more
BTransfer Efficiency82% efficientREVIEW
Transfer Efficiency
82% efficient
82% efficient
Info::
Transfer efficiency: 82%
An estimated 939 KB (18%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 939 KB of unused JavaScript. This wasted data produces 0.22g of unnecessary CO2 per page view.
Total waste: 939 KB (18% of page weight)
Unused JS 939 KB
0.22g unnecessary CO2 per visit
Actual transfer 5307 KB
Theoretical minimum 4367 KB
Potential savings 939 KB (0.22g 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 Weight90% cachedPASS
Repeat Visit Weight
90% cached
90% cached
Info::
90% reduction on repeat visits
Returning visitors download only 550 KB (vs 5307 KB first visit). 1234 of 1488 resources are served from browser cache, saving 1.10g CO2 per repeat visit.
Info::
Repeat visit: 0.13g CO2 (first visit: 1.23g)
First visit
5307 KB
Repeat visit
550 KB
90% reduction on repeat visits
Saving 1.10g CO2 per returning visitor
1234 resources served from cache · 254 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.