The technical bulletin by Prospec Test Hub Pvt. Ltd. highlights the critical need to balance the adoption of eco-friendly building materials with rigorous fire safety standards, particularly in high-risk sectors like transportation and infrastructure. While materials such as bamboo, engineered timber, hempcrete, and recycled plastics offer substantial environmental benefits and help lower carbon emissions, their organic or composite nature results in complex and unpredictable fire behaviors. To prevent catastrophic failures, excessive smoke production, or toxic emissions, these sustainable alternatives must be strictly evaluated against international testing standards (such as EN 45545-2, ASTM E84, and ISO 5660) for key parameters like ignitability, flame spread, heat release rate, and smoke density. Ultimately, real-world case studies demonstrate that early-stage validation, proper material engineering, and comprehensive testing are essential to ensuring that environmental goals do not compromise structural safety and human lives, reinforcing that a material is only truly sustainable if it performs safely under fire conditions.