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Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
72
GRADE
C
FIX
2
REVIEW
0
PASS
4
INFO
0
Device:
Mobile Desktop
Checks
6
4 PASS 2 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 7.6 MB, producing an estimated 1.79g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.37g, end-user device 1.38g.
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.
Info::
Green hosting reduces data center emissions

1.79g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 16% of websites

Sustainable Web Design model v4 · Page size: 7.6 MB

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

Energy Breakdown

Data center
0.04g
Network
0.37g
End-user device
1.38g
At 10,000 monthly views: Monthly: 17.9 kg · Annual: 214.8 kg · ≈ 26854 smartphone charges
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
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
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 87 KB (vs 7745 KB first visit). 44 of 45 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
7745 KB
Repeat visit
87 KB

99% reduction on repeat visits

Saving 1.77g CO2 per returning visitor

44 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
99% efficient
PASS
99% efficient
Info::
Transfer efficiency: 99%
Only 54 KB of potential savings identified. Your page is well-optimized for size.
99% efficient

Total waste: 54 KB (1% of page weight)

Unused JS 54 KB

0.01g unnecessary CO2 per visit

Actual transfer 7745 KB
Theoretical minimum 7690 KB
Potential savings 54 KB (0.01g 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.

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