Puro.earth Certification Framework - Biochar Edition 2025 V2
適用条件（eligibility）
Eligible activities require: 1) Eligible biomass sourcing (categories B-O, excluding A and J per Puro Biomass Sourcing Criteria); 2) Biochar production with H/C_org ratio <0.70; 3) Use in eligible applications (Table 3.2: soil amendment, cultivation substrates, animal husbandry, waste management, environmental management, built environment, natural environment restoration, retail gardening under conditions, industrial filter media under conditions, or geological storage under conditions); 4) Baseline demonstration (New Facility, Retrofit Facility, or Charcoal Repurpose); 5) Additionality (carbon, regulatory, and financial); 6) Environmental quality compliance (heavy metals, PAHs, PCDD/PCDF/PCB thresholds); 7) Leakage mitigation or quantification; 8) Monitoring plan implementation; 9) Stakeholder engagement per Puro requirements