https://ohm-energie.com
Sustainability
· 8 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
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction1.93g CO2 per viewFIX
CO2 Per Page Load
Action1.93g CO2 per view
1.93g CO2 per view
Warning::
1.93g CO2 per page view
This page transfers 8.2 MB, producing an estimated 1.93g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.40g, end-user device 1.48g.
Got: 1.93g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 231.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 231.8 kg of CO2 annually — equivalent to charging 28973 smartphones.
Info::
Green hosting reduces data center emissions
1.93g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 12% of websites
Sustainable Web Design model v4 · Page size: 8.2 MB
Your site
1.93g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.05g
Network
0.40g
End-user device
1.48g
At 10,000 monthly views: Monthly: 19.3 kg · Annual: 231.8 kg · ≈ 28973 smartphone charges
FCarbon BudgetAction88th percentileFIX
Carbon Budget
Action88th percentile
88th percentile
Warning::
1.93g CO2 — above the median website (0.60g)
Heavier than an estimated 12% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 88th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.93g
88th percentile
Cleaner than 12% of websites
✗ Above the median website
vs Median 222% more
vs Target 286% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Amazon Web Services uses renewable energy
Info::
Amazon Web Services: 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 Amazon Web Services✓CDN Not identified✗
Amazon Web Services: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BWeb Font Weight Variants7 font weights loaded across 4 famil(y/ies)REVIEW
Web Font Weight Variants
7 font weights loaded across 4 famil(y/ies)
7 font weights loaded across 4 famil(y/ies)
Info::
7 font weights loaded -- review whether all are used
5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Montserrat%3Aital%2Cwght%400%2C400, Poppins%3Aital%2Cwght%400%2C400%3B0%2C600, Source Sans 3%3Aital%2Cwght%400%2C400%3B0%2C700, Source%20Sans%203.
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 65 KB (vs 8356 KB first visit). 215 of 219 resources are served from browser cache, saving 1.92g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.93g)
First visit
8356 KB
Repeat visit
65 KB
99% reduction on repeat visits
Saving 1.92g CO2 per returning visitor
215 resources served from cache · 4 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 640 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 640 KB (8% of page weight)
Unused JS 640 KB
0.15g unnecessary CO2 per visit
Actual transfer 8356 KB
Theoretical minimum 7716 KB
Potential savings 640 KB (0.15g 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: OVHcloud
Image Optimization45 images, 400 KB total, 341 KB wastedINFO
Image Optimization
45 images, 400 KB total, 341 KB wasted
Image Optimization Audit
Total Images
45
Total Size
400 KB
Oversized
8
Wasted
341 KB
1 missing alt text 7 missing dimensions 36 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.