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https://skift.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
61
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
2.70g CO2 per view
FIX
2.70g CO2 per view
Critical::
2.70g CO2 per page view
This page transfers 11.4 MB, producing an estimated 2.70g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.07g, network 0.56g, end-user device 2.07g.
Got: 2.70g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 323.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 323.9 kg of CO2 annually — equivalent to charging 40486 smartphones.
Info::
Green hosting reduces data center emissions

2.70g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 11.4 MB

Your site
2.70g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.07g
Network
0.56g
End-user device
2.07g
At 10,000 monthly views: Monthly: 27.0 kg · Annual: 323.9 kg · ≈ 40486 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.70g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

2.70g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 350% more
vs Target 440% more
C
Transfer Efficiency
Action
66% efficient
REVIEW
66% efficient
Warning::
Transfer efficiency: 66%
An estimated 3998 KB (34%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 3998 KB of unused JavaScript. This wasted data produces 0.92g of unnecessary CO2 per page view.
66% efficient

Total waste: 3998 KB (34% of page weight)

Unused JS 3998 KB

0.92g unnecessary CO2 per visit

Actual transfer 11677 KB
Theoretical minimum 7679 KB
Potential savings 3998 KB (0.92g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: Verified by the Green Web Foundation
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 Cloudflare✓CDN Cloudflare✓

Cloudflare: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
82% cached
PASS
82% cached
Info::
82% reduction on repeat visits
Returning visitors download only 2102 KB (vs 11677 KB first visit). 752 of 810 resources are served from browser cache, saving 2.21g CO2 per repeat visit.
Info::
Repeat visit: 0.49g CO2 (first visit: 2.70g)
First visit
11677 KB
Repeat visit
2102 KB

82% reduction on repeat visits

Saving 2.21g CO2 per returning visitor

752 resources served from cache · 58 resources re-downloaded

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.

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