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https://www.render.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
65
GRADE
D
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
D
CO2 Per Page Load
Action
0.92g CO2 per view
FIX
0.92g CO2 per view
Info::
0.92g CO2 per page view
This page transfers 3.9 MB, producing an estimated 0.92g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.19g, end-user device 0.71g.
Got: 0.92g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 110.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 110.6 kg of CO2 annually — equivalent to charging 13830 smartphones.
Info::
Green hosting reduces data center emissions

0.92g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 41% of websites

Sustainable Web Design model v4 · Page size: 3.9 MB

Your site
0.92g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.19g
End-user device
0.71g
At 10,000 monthly views: Monthly: 9.2 kg · Annual: 110.6 kg · ≈ 13830 smartphone charges
D
Carbon Budget
Action
59th percentile
FIX
59th percentile
Warning::
0.92g CO2 — above the median website (0.60g)
Heavier than an estimated 41% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 59th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.92g

59th percentile

Cleaner than 41% of websites

✗ Above the median website

vs Median 54% more
vs Target 84% more
D
Transfer Efficiency
Action
47% efficient
FIX
47% efficient
Critical::
Transfer efficiency: 47%
An estimated 2122 KB (53%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2122 KB of unused JavaScript. This wasted data produces 0.49g of unnecessary CO2 per page view.
47% efficient

Total waste: 2122 KB (53% of page weight)

Unused JS 2122 KB

0.49g unnecessary CO2 per visit

Actual transfer 3988 KB
Theoretical minimum 1866 KB
Potential savings 2122 KB (0.49g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Green Hosting
Green (cdn)
PASS
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 Next.js✗CDN Cloudflare✓

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 75 KB (vs 3988 KB first visit). 132 of 133 resources are served from browser cache, saving 0.90g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.92g)
First visit
3988 KB
Repeat visit
75 KB

98% reduction on repeat visits

Saving 0.90g CO2 per returning visitor

132 resources served from cache · 1 resources re-downloaded

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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