Environmental communication is the process of informing various audiences about environmental issues, challenges, and solutions. With time, environmental communication has evolved and is now crucial for changing attitudes, influencing behaviours, and raising public awareness of environmental preservation and sustainability. This chapter introduces the concept of environmental communication. The first part of the chapter covers the concept and history of environmental communication. The second part examines the factors that influenced the development of environmental communication as well as the effective principles of environmental communication. By understanding what constitutes environmental communication, organisations can effectively communicate about environmental issues and encourage action at the individual, interpersonal, community, and societal levels.