CARB stands for California Air Resources Board (USA). CARB PHASE 2 regulation has to do with reducing formaldehyde emissions from hardwood plywood, particleboard, and medium-density fibreboard. This regulation is important because it ensures the air, we breathe is healthy and free from carcinogens that can harm us. CROSSBOND MDF Board is available with CARB Phase 2 compliance & TSCA Title VI certification. Read More: https://bit.ly/3amV2sg