A "Sustainer" refers to an individual, organization, or system that maintains or supports a particular process, environment, or community. This term is often used in discussions about sustainability, where sustainers play a crucial role in preserving resources, promoting ecological balance, and ensuring the well-being of future generations. In the context of environmental efforts, sustainers may include non-profit organizations, government agencies, and community groups that work together to implement practices like recycling, conservation, and renewable energy use. Their goal is to create a lasting positive impact on the planet and society.