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https://box.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
72
GRADE
C
FIX
2
REVIEW
2
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 2 REVIEW 2 FIX
D
CO2 Per Page Load
Action
0.82g CO2 per view
FIX
0.82g CO2 per view
Info::
0.82g CO2 per page view
This page transfers 3.5 MB, producing an estimated 0.82g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.17g, end-user device 0.63g.
Got: 0.82g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 98.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 98.6 kg of CO2 annually — equivalent to charging 12321 smartphones.
Info::
Green hosting reduces data center emissions

0.82g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 44% of websites

Sustainable Web Design model v4 · Page size: 3.5 MB

Your site
0.82g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.17g
End-user device
0.63g
At 10,000 monthly views: Monthly: 8.2 kg · Annual: 98.6 kg · ≈ 12321 smartphone charges
D
Carbon Budget
Action
56th percentile
FIX
56th percentile
Warning::
0.82g CO2 — above the median website (0.60g)
Heavier than an estimated 44% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 56th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.82g

56th percentile

Cleaner than 44% of websites

✗ Above the median website

vs Median 37% more
vs Target 64% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: 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 Google Cloud✓CDN Not identified✗

Google Cloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Transfer Efficiency
90% efficient
REVIEW
90% efficient
Info::
Transfer efficiency: 90%
An estimated 355 KB (10%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 355 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
90% efficient

Total waste: 355 KB (10% of page weight)

Unused JS 355 KB

0.08g unnecessary CO2 per visit

Actual transfer 3553 KB
Theoretical minimum 3197 KB
Potential savings 355 KB (0.08g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Repeat Visit Weight
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 89 KB (vs 3553 KB first visit). 275 of 284 resources are served from browser cache, saving 0.80g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.82g)
First visit
3553 KB
Repeat visit
89 KB

97% reduction on repeat visits

Saving 0.80g CO2 per returning visitor

275 resources served from cache · 9 resources re-downloaded

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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