https://fbi.gov
Sustainability
· 8 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
4
INFO
1
Checks
84 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction2.20g CO2 per viewFIX
CO2 Per Page Load
Action2.20g CO2 per view
2.20g CO2 per view
Critical::
2.20g CO2 per page view
This page transfers 9.3 MB, producing an estimated 2.20g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.06g, network 0.46g, end-user device 1.69g.
Got: 2.20g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 264.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 264.6 kg of CO2 annually — equivalent to charging 33074 smartphones.
Info::
Green hosting reduces data center emissions
2.20g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 9.3 MB
Your site
2.20g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.06g
Network
0.46g
End-user device
1.69g
At 10,000 monthly views: Monthly: 22.0 kg · Annual: 264.6 kg · ≈ 33074 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
2.20g 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
2.20g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 267% more
vs Target 341% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: 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 Cloudflare✓CDN Cloudflare✓
Cloudflare: 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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 16 KB (vs 9539 KB first visit). 96 of 97 resources are served from browser cache, saving 2.20g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 2.20g)
First visit
9539 KB
Repeat visit
16 KB
100% reduction on repeat visits
Saving 2.20g CO2 per returning visitor
96 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 498 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 498 KB (5% of page weight)
Unused JS 498 KB
0.12g unnecessary CO2 per visit
Actual transfer 9539 KB
Theoretical minimum 9040 KB
Potential savings 498 KB (0.12g 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: Cloudflare
Image Optimization1 images, 0 KB total, 0 KB wastedINFO
Image Optimization
1 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
0 KB
1 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.