https://Magicandcards.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
75
GRADE
C
FIX
0
REVIEW
5
PASS
2
INFO
1
Checks
82 PASS 5 REVIEW
BCO2 Per Page Load0.63g CO2 per viewREVIEW
CO2 Per Page Load
0.63g CO2 per view
0.63g CO2 per view
Info::
0.63g CO2 per page view
This page transfers 2.7 MB, producing an estimated 0.63g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.49g.
Got: 0.63g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 75.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 75.8 kg of CO2 annually — equivalent to charging 9476 smartphones.
Info::
Green hosting reduces data center emissions
0.63g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 50% of websites
Sustainable Web Design model v4 · Page size: 2.7 MB
Your site
0.63g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.13g
End-user device
0.49g
At 10,000 monthly views: Monthly: 6.3 kg · Annual: 75.8 kg · ≈ 9476 smartphone charges
BCarbon Budget50th percentileREVIEW
Carbon Budget
50th percentile
50th percentile
Warning::
0.63g CO2 — above the median website (0.60g)
Heavier than an estimated 50% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 50th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.63g
50th percentile
Cleaner than 50% of websites
✗ Above the median website
vs Median 5% more
vs Target 26% more
BTransfer Efficiency85% efficientREVIEW
Transfer Efficiency
85% efficient
85% efficient
Info::
Transfer efficiency: 85%
An estimated 402 KB (15%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 402 KB of unused JavaScript. This wasted data produces 0.09g of unnecessary CO2 per page view.
Total waste: 402 KB (15% of page weight)
Unused JS 402 KB
0.09g unnecessary CO2 per visit
Actual transfer 2733 KB
Theoretical minimum 2330 KB
Potential savings 402 KB (0.09g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction13 font weights loaded across 2 famil(y/ies)REVIEW
Web Font Weight Variants
Action13 font weights loaded across 2 famil(y/ies)
13 font weights loaded across 2 famil(y/ies)
Warning::
13 font weights loaded -- likely 100+ KB of unused payload
Loading 13 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Jost, Rubik.
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::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
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 Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 36 KB (vs 2733 KB first visit). 106 of 107 resources are served from browser cache, saving 0.62g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.63g)
First visit
2733 KB
Repeat visit
36 KB
99% reduction on repeat visits
Saving 0.62g CO2 per returning visitor
106 resources served from cache · 1 resources re-downloaded
Image Optimization36 images, 198 KB total, 191 KB wastedINFO
Image Optimization
36 images, 198 KB total, 191 KB wasted
Image Optimization Audit
Total Images
36
Total Size
198 KB
Oversized
15
Wasted
191 KB
1 missing alt text 32 missing dimensions 15 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.