The article "Synthesis and Deconstruction of Polyethylene-type Materials" by Simon T. Schwab, Maximilian Baur, Taylor F. Nelson, and Stefan Mecking, published in *Chemical Reviews*, discusses the challenges and advancements in the synthesis and deconstruction of polyethylene (PE) and other polyethylene-type materials for sustainable recycling. The authors highlight the chemical inertness of PE's hydrocarbon chains, which hinders their deconstruction into smaller molecules through pyrolysis, a process that is energy-intensive and yields a mix of compounds. Instead, they emphasize the importance of introducing predetermined breaking points or functional groups during the synthesis of PE-like materials to enable selective cleavage reactions under mild conditions (<200 °C). The article is divided into several sections, including an introduction, synthesis, deconstruction, conclusions, and author information. The synthesis section covers chain-growth polymers and step-growth polymers, detailing methods to introduce in-chain functional groups such as keto and ester groups. The deconstruction section discusses methods to break down PE waste under environmental conditions, emphasizing the importance of these processes in preventing plastic litter from persisting in the environment. Key findings include the development of materials with low-density in-chain functional groups that enhance the efficiency of chemical recycling and upcycling. These materials retain the desirable properties of PE while being more susceptible to deconstruction. The article also explores the synthesis of long-chain α,ω-telechelic molecules and the polymerization of long-chain monomers to create recyclable PE-like polymers. Overall, the research aims to advance the circular economy of plastics by improving the recyclability and sustainability of polyethylene-based materials.The article "Synthesis and Deconstruction of Polyethylene-type Materials" by Simon T. Schwab, Maximilian Baur, Taylor F. Nelson, and Stefan Mecking, published in *Chemical Reviews*, discusses the challenges and advancements in the synthesis and deconstruction of polyethylene (PE) and other polyethylene-type materials for sustainable recycling. The authors highlight the chemical inertness of PE's hydrocarbon chains, which hinders their deconstruction into smaller molecules through pyrolysis, a process that is energy-intensive and yields a mix of compounds. Instead, they emphasize the importance of introducing predetermined breaking points or functional groups during the synthesis of PE-like materials to enable selective cleavage reactions under mild conditions (<200 °C). The article is divided into several sections, including an introduction, synthesis, deconstruction, conclusions, and author information. The synthesis section covers chain-growth polymers and step-growth polymers, detailing methods to introduce in-chain functional groups such as keto and ester groups. The deconstruction section discusses methods to break down PE waste under environmental conditions, emphasizing the importance of these processes in preventing plastic litter from persisting in the environment. Key findings include the development of materials with low-density in-chain functional groups that enhance the efficiency of chemical recycling and upcycling. These materials retain the desirable properties of PE while being more susceptible to deconstruction. The article also explores the synthesis of long-chain α,ω-telechelic molecules and the polymerization of long-chain monomers to create recyclable PE-like polymers. Overall, the research aims to advance the circular economy of plastics by improving the recyclability and sustainability of polyethylene-based materials.