https://safety.google
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
62
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction4.35g CO2 per viewFIX
CO2 Per Page Load
Action4.35g CO2 per view
4.35g CO2 per view
Critical::
4.35g CO2 per page view
This page transfers 18.4 MB, producing an estimated 4.35g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.11g, network 0.90g, end-user device 3.34g.
Got: 4.35g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 522.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 522.5 kg of CO2 annually — equivalent to charging 65314 smartphones.
Info::
Green hosting reduces data center emissions
4.35g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 18.4 MB
Your site
4.35g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.11g
Network
0.90g
End-user device
3.34g
At 10,000 monthly views: Monthly: 43.5 kg · Annual: 522.5 kg · ≈ 65314 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
4.35g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
4.35g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 626% more
vs Target 771% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: Verified by the Green Web Foundation
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 Not identified✗
Google Cloud: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 30 KB (vs 18838 KB first visit). 68 of 69 resources are served from browser cache, saving 4.35g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 4.35g)
First visit
18838 KB
Repeat visit
30 KB
100% reduction on repeat visits
Saving 4.35g CO2 per returning visitor
68 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 257 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 257 KB (1% of page weight)
Unused JS 257 KB
0.06g unnecessary CO2 per visit
Actual transfer 18838 KB
Theoretical minimum 18581 KB
Potential savings 257 KB (0.06g 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: Google Cloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.