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https://missouri.edu

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
73
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
D
CO2 Per Page Load
Action
1.37g CO2 per view
FIX
1.37g CO2 per view
Warning::
1.37g CO2 per page view
This page transfers 5.8 MB, producing an estimated 1.37g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.28g, end-user device 1.05g.
Got: 1.37g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 164.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 164.1 kg of CO2 annually — equivalent to charging 20511 smartphones.
Info::
Green hosting reduces data center emissions

1.37g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 29% of websites

Sustainable Web Design model v4 · Page size: 5.8 MB

Your site
1.37g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.03g
Network
0.28g
End-user device
1.05g
At 10,000 monthly views: Monthly: 13.7 kg · Annual: 164.1 kg · ≈ 20511 smartphone charges
F
Carbon Budget
Action
71th percentile
FIX
71th percentile
Warning::
1.37g CO2 — above the median website (0.60g)
Heavier than an estimated 29% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 71th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.37g

71st percentile

Cleaner than 29% of websites

✗ Above the median website

vs Median 128% more
vs Target 173% more
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Green Hosting
Green (cdn)
PASS
Green (cdn)
Info::
Fastly CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Fastly: 100% renewable energy for edge network
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 Platform.sh✗CDN Fastly✓

Fastly: 100% renewable energy for edge network

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 88 KB (vs 5915 KB first visit). 66 of 69 resources are served from browser cache, saving 1.35g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.37g)
First visit
5915 KB
Repeat visit
88 KB

99% reduction on repeat visits

Saving 1.35g CO2 per returning visitor

66 resources served from cache · 3 resources re-downloaded

A+
Transfer Efficiency
95% efficient
PASS
95% efficient
Info::
Transfer efficiency: 95%
Only 284 KB of potential savings identified. Your page is well-optimized for size.
95% efficient

Total waste: 284 KB (5% of page weight)

Unused JS 284 KB

0.07g unnecessary CO2 per visit

Actual transfer 5915 KB
Theoretical minimum 5631 KB
Potential savings 284 KB (0.07g 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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