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https://slideserve.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
82
GRADE
B
FIX
1
REVIEW
1
PASS
4
INFO
0
Device:
Mobile Desktop
Checks
6
4 PASS 1 REVIEW 1 FIX
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 Amazon Web Services✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

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

Green Hosting

No green hosting detected

A
CO2 Per Page Load
0.26g CO2 per view
PASS
0.26g CO2 per view
Info::
0.26g CO2 per page view
This page transfers 0.9 MB, producing an estimated 0.26g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.05g, end-user device 0.17g.
Got: 0.26g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 31.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 31.4 kg of CO2 annually — equivalent to charging 3919 smartphones.

0.26g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 84% of websites

Sustainable Web Design model v4 · Page size: 0.9 MB

Your site
0.26g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.05g
Network
0.05g
End-user device
0.17g
At 10,000 monthly views: Monthly: 2.6 kg · Annual: 31.4 kg · ≈ 3919 smartphone charges
A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 17 KB (vs 944 KB first visit). 21 of 22 resources are served from browser cache, saving 0.26g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.26g)
First visit
944 KB
Repeat visit
17 KB

98% reduction on repeat visits

Saving 0.26g CO2 per returning visitor

21 resources served from cache · 1 resources re-downloaded

A
Carbon Budget
16th percentile
PASS
16th percentile
Info::
0.26g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 84% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 16th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.26g

16th percentile

Cleaner than 84% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 56% cleaner ✓
vs Target 48% cleaner ✓
A+
Transfer Efficiency
93% efficient
PASS
93% efficient
Info::
Transfer efficiency: 93%
Only 64 KB of potential savings identified. Your page is well-optimized for size.
93% efficient

Total waste: 64 KB (7% of page weight)

Unused JS 64 KB

0.02g unnecessary CO2 per visit

Actual transfer 944 KB
Theoretical minimum 880 KB
Potential savings 64 KB (0.02g CO2)

See Deep Analysis sections above for specific optimizations.

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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