https://www.discoveryworldtrekking.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
90
GRADE
A
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.33g CO2 per viewFIX
CO2 Per Page Load
Action1.33g CO2 per view
1.33g CO2 per view
Warning::
1.33g CO2 per page view
This page transfers 5.6 MB, producing an estimated 1.33g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.28g, end-user device 1.02g.
Got: 1.33g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 159.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 159.8 kg of CO2 annually — equivalent to charging 19979 smartphones.
Info::
Green hosting reduces data center emissions
1.33g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 30% of websites
Sustainable Web Design model v4 · Page size: 5.6 MB
Your site
1.33g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.28g
End-user device
1.02g
At 10,000 monthly views: Monthly: 13.3 kg · Annual: 159.8 kg · ≈ 19979 smartphone charges
DCarbon BudgetAction70th percentileFIX
Carbon Budget
Action70th percentile
70th percentile
Warning::
1.33g CO2 — above the median website (0.60g)
Heavier than an estimated 30% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 70th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.33g
70th percentile
Cleaner than 30% of websites
✗ Above the median website
vs Median 122% more
vs Target 166% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
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::
Vercel CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Vercel: Hosted on AWS/Google Cloud with 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 Hosting✓ Green Hosted
Hosting Next.js✗CDN Vercel✓
Vercel: Hosted on AWS/Google Cloud with renewable energy commitments
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 70 KB (vs 5762 KB first visit). 67 of 68 resources are served from browser cache, saving 1.32g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.33g)
First visit
5762 KB
Repeat visit
70 KB
99% reduction on repeat visits
Saving 1.32g CO2 per returning visitor
67 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency98% efficientPASS
Transfer Efficiency
98% efficient
98% efficient
Info::
Transfer efficiency: 98%
Only 121 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 121 KB (2% of page weight)
Unused JS 121 KB
0.03g unnecessary CO2 per visit
Actual transfer 5762 KB
Theoretical minimum 5640 KB
Potential savings 121 KB (0.03g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization29 images, 105 KB total, 0 KB wastedINFO
Image Optimization
29 images, 105 KB total, 0 KB wasted
Image Optimization Audit
Total Images
29
Total Size
105 KB
Oversized
1
3 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.