Skip to content
https://efe.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
76
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
D
CO2 Per Page Load
Action
1.19g CO2 per view
FIX
1.19g CO2 per view
Warning::
1.19g CO2 per page view
This page transfers 5.0 MB, producing an estimated 1.19g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.25g, end-user device 0.91g.
Got: 1.19g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 142.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 142.7 kg of CO2 annually — equivalent to charging 17831 smartphones.
Info::
Green hosting reduces data center emissions

1.19g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 34% of websites

Sustainable Web Design model v4 · Page size: 5.0 MB

Your site
1.19g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.03g
Network
0.25g
End-user device
0.91g
At 10,000 monthly views: Monthly: 11.9 kg · Annual: 142.7 kg · ≈ 17831 smartphone charges
D
Carbon Budget
Action
66th percentile
FIX
66th percentile
Warning::
1.19g CO2 — above the median website (0.60g)
Heavier than an estimated 34% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 66th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.19g

66th percentile

Cleaner than 34% of websites

✗ Above the median website

vs Median 98% more
vs Target 138% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
WordPress.com uses renewable energy
Info::
WordPress.com: 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 WordPress.com✓CDN Not identified✗

WordPress.com: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 146 KB (vs 5143 KB first visit). 112 of 115 resources are served from browser cache, saving 1.15g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.19g)
First visit
5143 KB
Repeat visit
146 KB

97% reduction on repeat visits

Saving 1.15g CO2 per returning visitor

112 resources served from cache · 3 resources re-downloaded

A+
Transfer Efficiency
93% efficient
PASS
93% efficient
Info::
Transfer efficiency: 93%
Only 360 KB of potential savings identified. Your page is well-optimized for size.
93% efficient

Total waste: 360 KB (7% of page weight)

Unused JS 360 KB

0.08g unnecessary CO2 per visit

Actual transfer 5143 KB
Theoretical minimum 4782 KB
Potential savings 360 KB (0.08g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback