The C121 GREEN part of Tasker is an environmental sustainability initiative, which focuses on creating a green and sustainable work environment in organizations. This initiative was designed to help organizations, by providing guidance and resources for implementing sustainable practices. The initiative offers several resources such as green office tips, energy efficiency procedures, and waste management plans. In addition, organizations are encouraged to engage in activities that support and promote sustainability initiatives in their respective communities. This can include promoting green products and services, becoming involved in green initiatives, and sponsoring green initiatives. Finally, Tasker encourages organizations to demonstrate their commitment to sustainability by becoming carbon-neutral or net-zero.