Skip to content
https://insidehighered.com

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
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
D
CO2 Per Page Load
Action
0.93g CO2 per view
FIX
0.93g CO2 per view
Info::
0.93g CO2 per page view
This page transfers 4.0 MB, producing an estimated 0.93g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.19g, end-user device 0.72g.
Got: 0.93g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 112.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 112.2 kg of CO2 annually — equivalent to charging 14024 smartphones.
Info::
Green hosting reduces data center emissions

0.93g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 41% of websites

Sustainable Web Design model v4 · Page size: 4.0 MB

Your site
0.93g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.19g
End-user device
0.72g
At 10,000 monthly views: Monthly: 9.3 kg · Annual: 112.2 kg · ≈ 14024 smartphone charges
D
Carbon Budget
Action
59th percentile
FIX
59th percentile
Warning::
0.93g CO2 — above the median website (0.60g)
Heavier than an estimated 41% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 59th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.93g

59th percentile

Cleaner than 41% of websites

✗ Above the median website

vs Median 56% more
vs Target 87% more
C
Transfer Efficiency
Action
69% efficient
REVIEW
69% efficient
Warning::
Transfer efficiency: 69%
An estimated 1273 KB (31%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1273 KB of unused JavaScript. This wasted data produces 0.29g of unnecessary CO2 per page view.
69% efficient

Total waste: 1273 KB (31% of page weight)

Unused JS 1273 KB

0.29g unnecessary CO2 per visit

Actual transfer 4045 KB
Theoretical minimum 2771 KB
Potential savings 1273 KB (0.29g CO2)

See Deep Analysis sections above for specific optimizations.

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
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 67 KB (vs 4045 KB first visit). 195 of 209 resources are served from browser cache, saving 0.92g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.93g)
First visit
4045 KB
Repeat visit
67 KB

98% reduction on repeat visits

Saving 0.92g CO2 per returning visitor

195 resources served from cache · 14 resources re-downloaded

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.

Send Feedback