https://cleantechnica.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 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: 110.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 110.6 kg of CO2 annually — equivalent to charging 13819 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: 110.6 kg · ≈ 13819 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 54% more
vs Target 84% more
BTransfer Efficiency87% efficientREVIEW
Transfer Efficiency
87% efficient
87% efficient
Info::
Transfer efficiency: 87%
An estimated 514 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 514 KB of unused JavaScript. This wasted data produces 0.12g of unnecessary CO2 per page view.
Total waste: 514 KB (13% of page weight)
Unused JS 514 KB
0.12g unnecessary CO2 per visit
Actual transfer 3985 KB
Theoretical minimum 3471 KB
Potential savings 514 KB (0.12g 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: Google Cloud, CDN: Cloudflare
Info::
Google Cloud: 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 Google Cloud✓CDN Cloudflare✓
Google Cloud: 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 21 KB (vs 3985 KB first visit). 74 of 75 resources are served from browser cache, saving 0.92g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.92g)
First visit
3985 KB
Repeat visit
21 KB
99% reduction on repeat visits
Saving 0.92g CO2 per returning visitor
74 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: Google Cloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.