https://www.marcellanyc.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
68
GRADE
D
FIX
2
REVIEW
3
PASS
2
INFO
1
Checks
82 PASS 3 REVIEW 2 FIX
FCO2 Per Page LoadAction1.63g CO2 per viewFIX
CO2 Per Page Load
Action1.63g CO2 per view
1.63g CO2 per view
Warning::
1.63g CO2 per page view
This page transfers 6.9 MB, producing an estimated 1.63g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.34g, end-user device 1.25g.
Got: 1.63g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 195.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 195.7 kg of CO2 annually — equivalent to charging 24464 smartphones.
Info::
Green hosting reduces data center emissions
1.63g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 21% of websites
Sustainable Web Design model v4 · Page size: 6.9 MB
Your site
1.63g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.34g
End-user device
1.25g
At 10,000 monthly views: Monthly: 16.3 kg · Annual: 195.7 kg · ≈ 24464 smartphone charges
FCarbon BudgetAction79th percentileFIX
Carbon Budget
Action79th percentile
79th percentile
Warning::
1.63g CO2 — above the median website (0.60g)
Heavier than an estimated 21% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 79th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.63g
79th percentile
Cleaner than 21% of websites
✗ Above the median website
vs Median 172% more
vs Target 226% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Cloudflare uses renewable energy
Info::
Cloudflare: Verified by the Green Web Foundation
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 Shopify✗
Cloudflare: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency84% efficientREVIEW
Transfer Efficiency
84% efficient
84% efficient
Info::
Transfer efficiency: 84%
An estimated 1106 KB (16%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1106 KB of unused JavaScript. This wasted data produces 0.26g of unnecessary CO2 per page view.
Total waste: 1106 KB (16% of page weight)
Unused JS 1106 KB
0.26g unnecessary CO2 per visit
Actual transfer 7056 KB
Theoretical minimum 5949 KB
Potential savings 1106 KB (0.26g 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.
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 238 KB (vs 7056 KB first visit). 638 of 653 resources are served from browser cache, saving 1.58g CO2 per repeat visit.
Info::
Repeat visit: 0.06g CO2 (first visit: 1.63g)
First visit
7056 KB
Repeat visit
238 KB
97% reduction on repeat visits
Saving 1.58g CO2 per returning visitor
638 resources served from cache · 15 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
Image Optimization1 images, 6 KB total, 0 KB wastedINFO
Image Optimization
1 images, 6 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
6 KB
1 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.