https://www.nytimes.com
Sustainability
· 8 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
3
PASS
2
INFO
1
Checks
82 PASS 3 REVIEW 2 FIX
FCO2 Per Page LoadAction2.39g CO2 per viewFIX
CO2 Per Page Load
Action2.39g CO2 per view
2.39g CO2 per view
Critical::
2.39g CO2 per page view
This page transfers 10.1 MB, producing an estimated 2.39g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.06g, network 0.49g, end-user device 1.84g.
Got: 2.39g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 287.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 287.0 kg of CO2 annually — equivalent to charging 35871 smartphones.
Info::
Green hosting reduces data center emissions
2.39g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 10.1 MB
Your site
2.39g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.06g
Network
0.49g
End-user device
1.84g
At 10,000 monthly views: Monthly: 23.9 kg · Annual: 287.0 kg · ≈ 35871 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
2.39g 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
2.39g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 299% more
vs Target 378% more
BTransfer Efficiency88% efficientREVIEW
Transfer Efficiency
88% efficient
88% efficient
Info::
Transfer efficiency: 88%
An estimated 1191 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1191 KB of unused JavaScript. This wasted data produces 0.28g of unnecessary CO2 per page view.
Total waste: 1191 KB (12% of page weight)
Unused JS 1191 KB
0.28g unnecessary CO2 per visit
Actual transfer 10346 KB
Theoretical minimum 9154 KB
Potential savings 1191 KB (0.28g CO2)
See Deep Analysis sections above for specific optimizations.
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
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 Not identified✗CDN Fastly✓
Fastly: 100% renewable energy for edge network
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 269 KB (vs 10346 KB first visit). 150 of 154 resources are served from browser cache, saving 2.33g CO2 per repeat visit.
Info::
Repeat visit: 0.06g CO2 (first visit: 2.39g)
First visit
10346 KB
Repeat visit
269 KB
97% reduction on repeat visits
Saving 2.33g CO2 per returning visitor
150 resources served from cache · 4 resources re-downloaded
Image Optimization15 images, 15 KB total, 0 KB wastedINFO
Image Optimization
15 images, 15 KB total, 0 KB wasted
Image Optimization Audit
Total Images
15
Total Size
15 KB
7 missing alt text 15 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.