They were the first airports in the Caribbean to obtain level 1 ACA (Airport Carbon Accreditation) certification in 2018. Now, the six airports have just obtained the level 2 certification, demonstrating their continuing efforts to reduce their carbon footprint. In three years, the airports' carbon footprint has been reduced by 13.5% gross while passenger volumes and operations have increased. This performance has been made possible by the implementation of a major photovoltaic panel program enabling each airport to produce carbon-free energy. Other actions implemented include improving energy efficiency by optimizing lighting using LED technology and installing more efficient air conditioning systems in the terminals.