According to the CBS data, the monthly distribution of passengers in all Croatian airports shows that the number of passengers starts to increase in March, reaches its peak in July and August, followed by a decline in September, and the lowest number of passengers in February. This is particularly pronounced on international flights because the air transport sector is directly connected to the summer season in Croatia. As a result of the pandemic, a large drop in the number of passengers was recorded, by 80% in the first half of 2020 compared to the same period in 2019. In view of the new EU goals for a climate-neutral economy by 2050, the goal of greening transport is the development of an energy-efficient and sustainable transport sector by encouraging the growth of registered alternative-powered vehicles, developing the infrastructure for charging alternative-powered vehicles, and investing in energy efficiency and sustainability of air infrastructure. port. We especially emphasize that reforms and investments in all types of transport (railway, road, sea, air and public city transport and inland waterway transport) are included within the NPOO. Given that railway, road, maritime and waterway transport were dealt with in earlier reforms, this one includes air and public urban/road transport in terms of greening. The proposed reforms and investments also cover all regions territorially of Croatia, which greatly contributes to the RRF&#39;s goals of promoting economic, social and territorial cohesion and strengthening capacities for resilience and adaptation.