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Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
82
GRADE
B
FIX
3
REVIEW
2
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
7.74g CO2 per view
FIX
7.74g CO2 per view
Critical::
7.74g CO2 per page view
This page transfers 27.3 MB, producing an estimated 7.74g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 1.43g, network 1.34g, end-user device 4.97g.
Got: 7.74g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 929.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 929.4 kg of CO2 annually — equivalent to charging 116171 smartphones.

7.74g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 27.3 MB

Your site
7.74g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
1.43g
Network
1.34g
End-user device
4.97g
At 10,000 monthly views: Monthly: 77.4 kg · Annual: 929.4 kg · ≈ 116171 smartphone charges
D
Green Hosting
Action
Not green
FIX
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Apache HTTP Server✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
7.74g 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

7.74g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 1191% more
vs Target 1449% more
B
Web Font Weight Variants
7 font weights loaded across 2 famil(y/ies)
REVIEW
7 font weights loaded across 2 famil(y/ies)
Info::
7 font weights loaded -- review whether all are used
5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: DM Sans, Playfair Display.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
100% cached
PASS
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 15 KB (vs 28003 KB first visit). 31 of 32 resources are served from browser cache, saving 7.74g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 7.74g)
First visit
28003 KB
Repeat visit
15 KB

100% reduction on repeat visits

Saving 7.74g CO2 per returning visitor

31 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
100% efficient
PASS
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
100% efficient
Actual transfer 28003 KB
Theoretical minimum 28003 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization
20 images, 6678 KB total, 4211 KB wasted
INFO

Image Optimization Audit

Total Images

20

Total Size

6678 KB

Oversized

7

Wasted

4211 KB

20 missing dimensions 10 missing lazy loading
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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