In recent years, the Urban Air Mobility (UAM) concept is considered to be one of the most innovative developments in aerospace industry, introducing different types of Vertical Take Off and Landing (VTOL) aircrafts and Unmanned Aerial Vehicles (UAV), all developed for the purpose of transporting passengers or cargo-carrying services. As we are still in a transition period of full UAM operations, stakeholders need to be prepared to encourage positive environmental outcomes. Though UAVs notably consume less fuel and consequently have a smaller impact on the environment, with increasing operations, they will certainly have an impact on the environment, so there is need for real evaluation and professional assessment. Doing this right can help public and private decision makers facing energy and environmental choices in the infancy of this commercial UAV age.