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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
90
GRADE
A
FIX
0
REVIEW
2
PASS
4
INFO
0
Checks
6
4 PASS 2 REVIEW
B
CO2 Per Page Load
0.51g CO2 per view
REVIEW
0.51g CO2 per view
Info::
0.51g CO2 per page view
This page transfers 2.2 MB, producing an estimated 0.51g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.11g, end-user device 0.39g.
Got: 0.51g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 61.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 61.4 kg of CO2 annually — equivalent to charging 7679 smartphones.
Info::
Green hosting reduces data center emissions

0.51g

Carbon Footprint per page view

Above sustainability target (0.50g)

Cleaner than 59% of websites

Sustainable Web Design model v4 · Page size: 2.2 MB

Your site
0.51g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.01g
Network
0.11g
End-user device
0.39g
At 10,000 monthly views: Monthly: 5.1 kg · Annual: 61.4 kg · ≈ 7679 smartphone charges
B
Carbon Budget
41th percentile
REVIEW
41th percentile
Info::
0.51g CO2 — below the median website (0.60g)
Better than an estimated 59% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 41th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.51g

41st percentile

Cleaner than 59% of websites

Above the median website

vs Median 15% cleaner ✓
vs Target 2% more
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Kinsta, CDN: Cloudflare
Info::
Kinsta: 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 KinstaCDN Cloudflare

Kinsta: 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
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 56 KB (vs 2215 KB first visit). 122 of 128 resources are served from browser cache, saving 0.50g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.51g)
First visit
2215 KB
Repeat visit
56 KB

97% reduction on repeat visits

Saving 0.50g CO2 per returning visitor

122 resources served from cache · 6 resources re-downloaded

A+
Transfer Efficiency
91% efficient
PASS
91% efficient
Info::
Transfer efficiency: 91%
Only 192 KB of potential savings identified. Your page is well-optimized for size.
91% efficient

Total waste: 192 KB (9% of page weight)

Unused JS 192 KB

0.04g unnecessary CO2 per visit

Actual transfer 2215 KB
Theoretical minimum 2022 KB
Potential savings 192 KB (0.04g 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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