https://promodog.pl
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
81
GRADE
B
FIX
0
REVIEW
4
PASS
3
INFO
1
Checks
83 PASS 4 REVIEW
BCarbon Budget35th percentileREVIEW
Carbon Budget
35th percentile
35th percentile
Info::
0.45g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 65% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 35th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.45g
35th percentile
Cleaner than 65% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 24% cleaner ✓
vs Target 9% cleaner ✓
CTransfer EfficiencyAction67% efficientREVIEW
Transfer Efficiency
Action67% efficient
67% efficient
Warning::
Transfer efficiency: 67%
An estimated 651 KB (33%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 651 KB of unused JavaScript. This wasted data produces 0.15g of unnecessary CO2 per page view.
Total waste: 651 KB (33% of page weight)
Unused JS 651 KB
0.15g unnecessary CO2 per visit
Actual transfer 1962 KB
Theoretical minimum 1311 KB
Potential savings 651 KB (0.15g CO2)
See Deep Analysis sections above for specific optimizations.
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
ACO2 Per Page Load0.45g CO2 per viewPASS
CO2 Per Page Load
0.45g CO2 per view
0.45g CO2 per view
Info::
0.45g CO2 per page view
This page transfers 1.9 MB, producing an estimated 0.45g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.35g.
Got: 0.45g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 54.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 54.4 kg of CO2 annually — equivalent to charging 6805 smartphones.
Info::
Green hosting reduces data center emissions
0.45g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 65% of websites
Sustainable Web Design model v4 · Page size: 1.9 MB
Your site
0.45g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.09g
End-user device
0.35g
At 10,000 monthly views: Monthly: 4.5 kg · Annual: 54.4 kg · ≈ 6805 smartphone charges
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 Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight95% cachedPASS
Repeat Visit Weight
95% cached
95% cached
Info::
95% reduction on repeat visits
Returning visitors download only 101 KB (vs 1962 KB first visit). 154 of 157 resources are served from browser cache, saving 0.43g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.45g)
First visit
1962 KB
Repeat visit
101 KB
95% reduction on repeat visits
Saving 0.43g CO2 per returning visitor
154 resources served from cache · 3 resources re-downloaded
Image Optimization35 images, 3 KB total, 0 KB wastedINFO
Image Optimization
35 images, 3 KB total, 0 KB wasted
Image Optimization Audit
Total Images
35
Total Size
3 KB
7 missing dimensions 15 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.