• Utilization of Renewable Feedstocks: The development of bio-based polymers using monomers derived from plant sources, agricultural waste, or CO₂-based precursors . • Biodegradable and Recyclable Polymers: Designing semicrystalline polymers that are either biodegradable under natural conditions or efficiently recyclable to promote a circular economy . • Eco-Friendly Polymerization Methods: Employing solvent-free synthesis, enzymatic catalysis, and atom-economical reactions to minimize hazardous waste generation . • Advanced Recycling and Upcycling Technologies: Improving polymer processing to enable efficient mechanical and chemical recycling, reducing dependence on virgin materials. . • These strategies aim to preserve the advantageous properties of semicrystalline polymers while significantly reducing their environmental footprint.