https://long-change.mysites.io
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
82
GRADE
B
FIX
0
REVIEW
4
PASS
3
INFO
1
Checks
83 PASS 4 REVIEW
BCO2 Per Page Load0.59g CO2 per viewREVIEW
CO2 Per Page Load
0.59g CO2 per view
0.59g CO2 per view
Info::
0.59g CO2 per page view
This page transfers 2.5 MB, producing an estimated 0.59g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.12g, end-user device 0.45g.
Got: 0.59g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 70.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 70.9 kg of CO2 annually — equivalent to charging 8859 smartphones.
Info::
Green hosting reduces data center emissions
0.59g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 51% of websites
Sustainable Web Design model v4 · Page size: 2.5 MB
Your site
0.59g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.12g
End-user device
0.45g
At 10,000 monthly views: Monthly: 5.9 kg · Annual: 70.9 kg · ≈ 8859 smartphone charges
BCarbon Budget49th percentileREVIEW
Carbon Budget
49th percentile
49th percentile
Info::
0.59g CO2 — below the median website (0.60g)
Better than an estimated 51% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 49th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.59g
49th percentile
Cleaner than 51% of websites
✗ Above the median website
vs Median 2% cleaner ✓
vs Target 18% more
CWeb Font Weight VariantsAction18 font weights loaded across 1 famil(y/ies)REVIEW
Web Font Weight Variants
Action18 font weights loaded across 1 famil(y/ies)
18 font weights loaded across 1 famil(y/ies)
Warning::
18 font weights loaded -- likely 100+ KB of unused payload
Loading 18 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: Titillium Web.
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 Flywheel✗CDN Fastly✓
Fastly: 100% renewable energy for edge network
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 43 KB (vs 2555 KB first visit). 125 of 126 resources are served from browser cache, saving 0.58g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.59g)
First visit
2555 KB
Repeat visit
43 KB
98% reduction on repeat visits
Saving 0.58g CO2 per returning visitor
125 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency94% efficientPASS
Transfer Efficiency
94% efficient
94% efficient
Info::
Transfer efficiency: 94%
Only 152 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 152 KB (6% of page weight)
Unused JS 152 KB
0.04g unnecessary CO2 per visit
Actual transfer 2555 KB
Theoretical minimum 2402 KB
Potential savings 152 KB (0.04g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization18 images, 1416 KB total, 659 KB wastedINFO
Image Optimization
18 images, 1416 KB total, 659 KB wasted
Image Optimization Audit
Total Images
18
Total Size
1416 KB
Oversized
7
Wasted
659 KB
15 missing dimensions 17 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.