https://foreignpolicy.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
76
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction1.23g CO2 per viewFIX
CO2 Per Page Load
Action1.23g CO2 per view
1.23g CO2 per view
Warning::
1.23g CO2 per page view
This page transfers 5.2 MB, producing an estimated 1.23g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.25g, end-user device 0.95g.
Got: 1.23g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 147.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 147.7 kg of CO2 annually — equivalent to charging 18459 smartphones.
Info::
Green hosting reduces data center emissions
1.23g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 32% of websites
Sustainable Web Design model v4 · Page size: 5.2 MB
Your site
1.23g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.25g
End-user device
0.95g
At 10,000 monthly views: Monthly: 12.3 kg · Annual: 147.7 kg · ≈ 18459 smartphone charges
DCarbon BudgetAction68th percentileFIX
Carbon Budget
Action68th percentile
68th percentile
Warning::
1.23g CO2 — above the median website (0.60g)
Heavier than an estimated 32% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 68th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.23g
68th percentile
Cleaner than 32% of websites
✗ Above the median website
vs Median 105% more
vs Target 146% more
BTransfer Efficiency77% efficientREVIEW
Transfer Efficiency
77% efficient
77% efficient
Info::
Transfer efficiency: 77%
An estimated 1241 KB (23%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1241 KB of unused JavaScript. This wasted data produces 0.29g of unnecessary CO2 per page view.
Total waste: 1241 KB (23% of page weight)
Unused JS 1241 KB
0.29g unnecessary CO2 per visit
Actual transfer 5324 KB
Theoretical minimum 4082 KB
Potential savings 1241 KB (0.29g CO2)
See Deep Analysis sections above for specific optimizations.
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 Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 213 KB (vs 5324 KB first visit). 275 of 292 resources are served from browser cache, saving 1.18g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 1.23g)
First visit
5324 KB
Repeat visit
213 KB
96% reduction on repeat visits
Saving 1.18g CO2 per returning visitor
275 resources served from cache · 17 resources re-downloaded
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.