Cellnex's Net-Zero strategy is structured around seven key pillars: 1. Science-based reduction targets, 2. Energy transition, 3. Value chain engagement, 4. Circular economy practices, 5. Sustainable mobility, 6. Neutralisation of residual emissions, 7. Transparency and governance. The company plans to address residual emissions by financing high-quality carbon reduction and removal projects outside its value chain, aiming to foster positive impacts on ecosystems and local communities. Cellnex also aims to verify its Net-Zero target through the Science Based Targets initiative (SBTi). Key components of the reduction strategy include leveraging renewable energy through the purchase of Guarantees of Origin (GoOs) and expanding solar panel deployments.

Since 2015, Cellnex has offset emissions to achieve neutrality in Scope 1 for all the countries. In 2024, Cellnex offset 4,979.96 t CO2e by acquiring 4,636 CER credits in the project 'Improved Cookstoves in Ethiopia', adorned with the Gold Standard certification, and 150 MITERD credits in the project 'Galicia Forest' in Spain. The 2024 carbon footprint of the Cellnex Foundation has been calculated and its emissions,172,5t CO2e, have also been offset.