https://sdsu.edu
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
66
GRADE
D
FIX
2
REVIEW
0
PASS
4
INFO
0
Checks
64 PASS 2 FIX
FCO2 Per Page LoadAction14.62g CO2 per viewFIX
CO2 Per Page Load
Action14.62g CO2 per view
14.62g CO2 per view
Critical::
14.62g CO2 per page view
This page transfers 61.8 MB, producing an estimated 14.62g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.37g, network 3.02g, end-user device 11.23g.
Got: 14.62g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 1753.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 1753.9 kg of CO2 annually — equivalent to charging 219236 smartphones.
Info::
Green hosting reduces data center emissions
14.62g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 61.8 MB
Your site
14.62g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.37g
Network
3.02g
End-user device
11.23g
At 10,000 monthly views: Monthly: 146.2 kg · Annual: 1753.9 kg · ≈ 219236 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
14.62g 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
14.62g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 2336% more
vs Target 2823% more
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 116 KB (vs 63233 KB first visit). 157 of 162 resources are served from browser cache, saving 14.59g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 14.62g)
First visit
63233 KB
Repeat visit
116 KB
100% reduction on repeat visits
Saving 14.59g CO2 per returning visitor
157 resources served from cache · 5 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 335 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 335 KB (1% of page weight)
Unused JS 335 KB
0.08g unnecessary CO2 per visit
Actual transfer 63233 KB
Theoretical minimum 62897 KB
Potential savings 335 KB (0.08g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
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.