https://www.timescale.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
72
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction0.92g CO2 per viewFIX
CO2 Per Page Load
Action0.92g CO2 per view
0.92g CO2 per view
Info::
0.92g CO2 per page view
This page transfers 3.9 MB, producing an estimated 0.92g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.19g, end-user device 0.71g.
Got: 0.92g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 110.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 110.3 kg of CO2 annually — equivalent to charging 13781 smartphones.
Info::
Green hosting reduces data center emissions
0.92g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 41% of websites
Sustainable Web Design model v4 · Page size: 3.9 MB
Your site
0.92g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.19g
End-user device
0.71g
At 10,000 monthly views: Monthly: 9.2 kg · Annual: 110.3 kg · ≈ 13781 smartphone charges
DCarbon BudgetAction59th percentileFIX
Carbon Budget
Action59th percentile
59th percentile
Warning::
0.92g CO2 — above the median website (0.60g)
Heavier than an estimated 41% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 59th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.92g
59th percentile
Cleaner than 41% of websites
✗ Above the median website
vs Median 53% more
vs Target 84% more
CTransfer EfficiencyAction66% efficientREVIEW
Transfer Efficiency
Action66% efficient
66% efficient
Warning::
Transfer efficiency: 66%
An estimated 1341 KB (34%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1341 KB of unused JavaScript. This wasted data produces 0.31g of unnecessary CO2 per page view.
Total waste: 1341 KB (34% of page weight)
Unused JS 1341 KB
0.31g unnecessary CO2 per visit
Actual transfer 3975 KB
Theoretical minimum 2633 KB
Potential savings 1341 KB (0.31g 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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 44 KB (vs 3975 KB first visit). 130 of 131 resources are served from browser cache, saving 0.91g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.92g)
First visit
3975 KB
Repeat visit
44 KB
99% reduction on repeat visits
Saving 0.91g CO2 per returning visitor
130 resources served from cache · 1 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.