Skip to content
https://nationalreview.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
64
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
F
CO2 Per Page Load
Action
1.76g CO2 per view
FIX
1.76g CO2 per view
Warning::
1.76g CO2 per page view
This page transfers 7.4 MB, producing an estimated 1.76g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.36g, end-user device 1.35g.
Got: 1.76g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 211.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 211.0 kg of CO2 annually — equivalent to charging 26378 smartphones.
Info::
Green hosting reduces data center emissions

1.76g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 17% of websites

Sustainable Web Design model v4 · Page size: 7.4 MB

Your site
1.76g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.36g
End-user device
1.35g
At 10,000 monthly views: Monthly: 17.6 kg · Annual: 211.0 kg · ≈ 26378 smartphone charges
F
Carbon Budget
Action
83th percentile
FIX
83th percentile
Warning::
1.76g CO2 — above the median website (0.60g)
Heavier than an estimated 17% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 83th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.76g

83rd percentile

Cleaner than 17% of websites

✗ Above the median website

vs Median 193% more
vs Target 252% more
C
Transfer Efficiency
Action
75% efficient
REVIEW
75% efficient
Warning::
Transfer efficiency: 75%
An estimated 1903 KB (25%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1903 KB of unused JavaScript. This wasted data produces 0.44g of unnecessary CO2 per page view.
75% efficient

Total waste: 1903 KB (25% of page weight)

Unused JS 1903 KB

0.44g unnecessary CO2 per visit

Actual transfer 7608 KB
Theoretical minimum 5704 KB
Potential savings 1903 KB (0.44g 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: Snowplow Analytics, CDN: Cloudflare
Info::
Snowplow Analytics: 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 Snowplow Analytics✓CDN Cloudflare✓

Snowplow Analytics: 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
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 323 KB (vs 7608 KB first visit). 1274 of 1446 resources are served from browser cache, saving 1.68g CO2 per repeat visit.
Info::
Repeat visit: 0.07g CO2 (first visit: 1.76g)
First visit
7608 KB
Repeat visit
323 KB

96% reduction on repeat visits

Saving 1.68g CO2 per returning visitor

1274 resources served from cache · 172 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