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https://photoshelter.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
58
GRADE
D
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.98g CO2 per view
FIX
1.98g CO2 per view
Warning::
1.98g CO2 per page view
This page transfers 7.0 MB, producing an estimated 1.98g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.37g, network 0.34g, end-user device 1.27g.
Got: 1.98g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 237.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 237.7 kg of CO2 annually — equivalent to charging 29708 smartphones.

1.98g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 11% of websites

Sustainable Web Design model v4 · Page size: 7.0 MB

Your site
1.98g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.37g
Network
0.34g
End-user device
1.27g
At 10,000 monthly views: Monthly: 19.8 kg · Annual: 237.7 kg · ≈ 29708 smartphone charges
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
89th percentile
FIX
89th percentile
Warning::
1.98g CO2 — above the median website (0.60g)
Heavier than an estimated 11% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 89th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.98g

89th percentile

Cleaner than 11% of websites

✗ Above the median website

vs Median 230% more
vs Target 296% more
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 314 KB (vs 7161 KB first visit). 141 of 144 resources are served from browser cache, saving 1.89g CO2 per repeat visit.
Info::
Repeat visit: 0.09g CO2 (first visit: 1.98g)
First visit
7161 KB
Repeat visit
314 KB

96% reduction on repeat visits

Saving 1.89g CO2 per returning visitor

141 resources served from cache · 3 resources re-downloaded

A+
Transfer Efficiency
90% efficient
PASS
90% efficient
Info::
Transfer efficiency: 90%
Only 681 KB of potential savings identified. Your page is well-optimized for size.
90% efficient

Total waste: 681 KB (10% of page weight)

Unused JS 681 KB

0.19g unnecessary CO2 per visit

Actual transfer 7161 KB
Theoretical minimum 6480 KB
Potential savings 681 KB (0.19g CO2)

See Deep Analysis sections above for specific optimizations.

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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