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https://www.asahi.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
54
GRADE
F
FIX
3
REVIEW
2
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.79g CO2 per view
FIX
1.79g CO2 per view
Warning::
1.79g CO2 per page view
This page transfers 6.3 MB, producing an estimated 1.79g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.33g, network 0.31g, end-user device 1.15g.
Got: 1.79g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 214.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 214.8 kg of CO2 annually — equivalent to charging 26854 smartphones.

1.79g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 16% of websites

Sustainable Web Design model v4 · Page size: 6.3 MB

Your site
1.79g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.33g
Network
0.31g
End-user device
1.15g
At 10,000 monthly views: Monthly: 17.9 kg · Annual: 214.8 kg · ≈ 26854 smartphone charges
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
84th percentile
FIX
84th percentile
Warning::
1.79g CO2 — above the median website (0.60g)
Heavier than an estimated 16% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 84th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.79g

84th percentile

Cleaner than 16% of websites

✗ Above the median website

vs Median 198% more
vs Target 258% more
C
Transfer Efficiency
Action
71% efficient
REVIEW
71% efficient
Warning::
Transfer efficiency: 71%
An estimated 1871 KB (29%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1871 KB of unused JavaScript. This wasted data produces 0.52g of unnecessary CO2 per page view.
71% efficient

Total waste: 1871 KB (29% of page weight)

Unused JS 1871 KB

0.52g unnecessary CO2 per visit

Actual transfer 6473 KB
Theoretical minimum 4602 KB
Potential savings 1871 KB (0.52g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 62 KB (vs 6473 KB first visit). 412 of 422 resources are served from browser cache, saving 1.77g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.79g)
First visit
6473 KB
Repeat visit
62 KB

99% reduction on repeat visits

Saving 1.77g CO2 per returning visitor

412 resources served from cache · 10 resources re-downloaded

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

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