https://roma.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
75
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction1.68g CO2 per viewFIX
CO2 Per Page Load
Action1.68g CO2 per view
1.68g CO2 per view
Warning::
1.68g CO2 per page view
This page transfers 7.1 MB, producing an estimated 1.68g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.35g, end-user device 1.29g.
Got: 1.68g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 201.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 201.3 kg of CO2 annually — equivalent to charging 25168 smartphones.
Info::
Green hosting reduces data center emissions
1.68g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 20% of websites
Sustainable Web Design model v4 · Page size: 7.1 MB
Your site
1.68g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.35g
End-user device
1.29g
At 10,000 monthly views: Monthly: 16.8 kg · Annual: 201.3 kg · ≈ 25168 smartphone charges
FCarbon BudgetAction80th percentileFIX
Carbon Budget
Action80th percentile
80th percentile
Warning::
1.68g CO2 — above the median website (0.60g)
Heavier than an estimated 20% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 80th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.68g
80th percentile
Cleaner than 20% of websites
✗ Above the median website
vs Median 180% more
vs Target 236% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Apache HTTP Server uses renewable energy
Info::
Apache HTTP Server: 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 Apache HTTP Server✓CDN Not identified✗
Apache HTTP Server: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
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+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 69 KB (vs 7259 KB first visit). 136 of 153 resources are served from browser cache, saving 1.66g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.68g)
First visit
7259 KB
Repeat visit
69 KB
99% reduction on repeat visits
Saving 1.66g CO2 per returning visitor
136 resources served from cache · 17 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 582 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 582 KB (8% of page weight)
Unused JS 582 KB
0.13g unnecessary CO2 per visit
Actual transfer 7259 KB
Theoretical minimum 6676 KB
Potential savings 582 KB (0.13g 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: Hetzner Online GmbH
Image Optimization90 images, 7839 KB total, 1572 KB wastedINFO
Image Optimization
90 images, 7839 KB total, 1572 KB wasted
Image Optimization Audit
Total Images
90
Total Size
7839 KB
Oversized
16
Wasted
1572 KB
3 missing alt text 2 missing dimensions 77 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.