With increasing legal obligations and ambitious net-zero targets set by Communications Service Providers (CSPs), alongside the rapid growth of global connectivity and data demand, these providers are actively seeking ways to enhance sustainability across their operations. Passive cellular antennas, critical elements of telco networks as discussed in our previous article, represent a significant opportunity to improve sustainability through energy efficiency and innovative design that reduce environmental footprint and lengthen the life span of products before replacement. To help achieve their ambitious environmental goals, CSPs must strategically manage antenna deployments and interoperability with other elements of the Radio Access Network (RAN). In fact, the fastest growing subsegment of passive cellular antennas is green and more sustainable antennas, driven by operator requirements for low environmental impact and increasingly tightening legislation.