https://givebutter.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
84
GRADE
B
FIX
2
REVIEW
0
PASS
4
INFO
0
Checks
64 PASS 2 FIX
DCO2 Per Page LoadAction0.90g CO2 per viewFIX
CO2 Per Page Load
Action0.90g CO2 per view
0.90g CO2 per view
Info::
0.90g CO2 per page view
This page transfers 3.8 MB, producing an estimated 0.90g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.19g, end-user device 0.69g.
Got: 0.90g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 108.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 108.5 kg of CO2 annually — equivalent to charging 13566 smartphones.
Info::
Green hosting reduces data center emissions
0.90g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 42% of websites
Sustainable Web Design model v4 · Page size: 3.8 MB
Your site
0.90g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.19g
End-user device
0.69g
At 10,000 monthly views: Monthly: 9.0 kg · Annual: 108.5 kg · ≈ 13566 smartphone charges
DCarbon BudgetAction58th percentileFIX
Carbon Budget
Action58th percentile
58th percentile
Warning::
0.90g CO2 — above the median website (0.60g)
Heavier than an estimated 42% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 58th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.90g
58th percentile
Cleaner than 42% of websites
✗ Above the median website
vs Median 51% more
vs Target 81% more
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: Verified by the Green Web Foundation
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 Cloudflare✓CDN Cloudflare✓
Cloudflare: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 143 KB (vs 3913 KB first visit). 182 of 184 resources are served from browser cache, saving 0.87g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 0.90g)
First visit
3913 KB
Repeat visit
143 KB
96% reduction on repeat visits
Saving 0.87g CO2 per returning visitor
182 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency94% efficientPASS
Transfer Efficiency
94% efficient
94% efficient
Info::
Transfer efficiency: 94%
Only 217 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 217 KB (6% of page weight)
Unused JS 217 KB
0.05g unnecessary CO2 per visit
Actual transfer 3913 KB
Theoretical minimum 3695 KB
Potential savings 217 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.