ICAO (International Civil Aviation Organization) is important because it sets global standards for aviation safety, security, efficiency, and environmental protection. By harmonizing regulations across countries, ICAO helps ensure that air travel remains safe and organized worldwide. Its regulations help prevent accidents, improve air traffic management, and support the sustainable growth of the aviation industry. Additionally, ICAO's efforts to reduce aviation’s environmental impact help minimize emissions and noise, contributing to a greener future for air travel.