The task of an environmentalist has never been more tough and challenging. Considering the swift deterioration of Earth’s natural ecosystems, as well as the decline in ecosystem services and biodiversity, scientists need to discover fresh and efficient approaches of fostering community engagement and trust. For many reasons, nonviolence is a crucial component of sustainability. Environmentalists, preservationists, and ecologists have long used nonviolent actions, such as Australia’s Daintree Rainforest, nuclear waste repository at Yucca Mountain in the United States, anti-nuclear blockades at Australia’s Roxby Downs and Jabiluka, and climate actions against CSG (coal seam gas) and coal mining, to guard environments from harm and to advocate for more sustainable processes and institutions. Concern over the significant environmental impact of militarism is just one of the many reasons why nonviolent environmental act has resisted pugnaciousness. In this chapter, I explore the possible benefits of nonviolent communication, also referred to as compassionate or collaborative communication, for protecting the environment. Dr. Marshall Rosenberg created the structured communication style known as nonviolent communication in the 1960s. Its goals are to promote interpersonal understanding and bond by acknowledging and communicating people’s feelings, needs, and values, as well as by asking for specific actions to address those needs. It offers enormous promise for conservation applications and has shown significant results in an array of sectors, incorporating social work, mental health, and prisoner reform. While there isn’t a single effective communication technique, conservation scientists and practitioners can employ nonviolent communication to discuss significant and occasionally divisive environmental concerns with the public, legislators, and other professionals. Because it provides an alternative to militarism for national and regional self-defence as well as the overthrow of dictatorships, genocidal regimes, and military dictatorships, nonviolence is crucial for sustainability. The social, economic, and environmental consequences of this option are significantly lower. The introduction and methods section of the article start with a description of the 2030 Agenda for Sustainable Development, a definition of “sustainability”, and an explanation of how nonviolence relates to sustainability. The case studies and an explanation of how these peaceful acts aided in environmental sustainability come next. The effects of militarism on the environment are discussed, and workable alternatives that do less harm to the environment are suggested, such as peaceful defence and regime change.