https://db.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
68
GRADE
D
FIX
2
REVIEW
2
PASS
2
INFO
0
Checks
62 PASS 2 REVIEW 2 FIX
DCarbon BudgetAction51th percentileFIX
Carbon Budget
Action51th percentile
51th percentile
Warning::
0.65g CO2 — above the median website (0.60g)
Heavier than an estimated 49% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 51th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.65g
51st percentile
Cleaner than 49% of websites
✗ Above the median website
vs Median 8% more
vs Target 30% more
DTransfer EfficiencyAction43% efficientFIX
Transfer Efficiency
Action43% efficient
43% efficient
Critical::
Transfer efficiency: 43%
An estimated 1604 KB (57%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1604 KB of unused JavaScript. This wasted data produces 0.37g of unnecessary CO2 per page view.
Total waste: 1604 KB (57% of page weight)
Unused JS 1604 KB
0.37g unnecessary CO2 per visit
Actual transfer 2801 KB
Theoretical minimum 1197 KB
Potential savings 1604 KB (0.37g CO2)
See Deep Analysis sections above for specific optimizations.
BCO2 Per Page Load0.65g CO2 per viewREVIEW
CO2 Per Page Load
0.65g CO2 per view
0.65g CO2 per view
Info::
0.65g CO2 per page view
This page transfers 2.7 MB, producing an estimated 0.65g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.50g.
Got: 0.65g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 77.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 77.7 kg of CO2 annually — equivalent to charging 9713 smartphones.
Info::
Green hosting reduces data center emissions
0.65g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 49% of websites
Sustainable Web Design model v4 · Page size: 2.7 MB
Your site
0.65g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.13g
End-user device
0.50g
At 10,000 monthly views: Monthly: 6.5 kg · Annual: 77.7 kg · ≈ 9713 smartphone charges
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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 30 KB (vs 2801 KB first visit). 71 of 73 resources are served from browser cache, saving 0.64g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.65g)
First visit
2801 KB
Repeat visit
30 KB
99% reduction on repeat visits
Saving 0.64g CO2 per returning visitor
71 resources served from cache · 2 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.