https://advancedenergyunited.org
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
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction1.87g CO2 per viewFIX
CO2 Per Page Load
Action1.87g CO2 per view
1.87g CO2 per view
Warning::
1.87g CO2 per page view
This page transfers 7.9 MB, producing an estimated 1.87g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.39g, end-user device 1.44g.
Got: 1.87g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 225.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 225.0 kg of CO2 annually — equivalent to charging 28124 smartphones.
Info::
Green hosting reduces data center emissions
1.87g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 14% of websites
Sustainable Web Design model v4 · Page size: 7.9 MB
Your site
1.87g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.05g
Network
0.39g
End-user device
1.44g
At 10,000 monthly views: Monthly: 18.7 kg · Annual: 225.0 kg · ≈ 28124 smartphone charges
FCarbon BudgetAction86th percentileFIX
Carbon Budget
Action86th percentile
86th percentile
Warning::
1.87g CO2 — above the median website (0.60g)
Heavier than an estimated 14% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 86th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.87g
86th percentile
Cleaner than 14% of websites
✗ Above the median website
vs Median 212% more
vs Target 275% 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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
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 GoDaddy✗CDN Cloudflare✓
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 17 KB (vs 8111 KB first visit). 69 of 70 resources are served from browser cache, saving 1.87g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.87g)
First visit
8111 KB
Repeat visit
17 KB
100% reduction on repeat visits
Saving 1.87g CO2 per returning visitor
69 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 94 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 94 KB (1% of page weight)
Unused JS 94 KB
0.02g unnecessary CO2 per visit
Actual transfer 8111 KB
Theoretical minimum 8017 KB
Potential savings 94 KB (0.02g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization7 images, 955 KB total, 863 KB wastedINFO
Image Optimization
7 images, 955 KB total, 863 KB wasted
Image Optimization Audit
Total Images
7
Total Size
955 KB
Oversized
7
Wasted
863 KB
1 missing alt text 7 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.