Green public relations refers to the impact of corporate and ecologically sustainable development concepts on public relations, the selection of media with "green" characteristics to carry out communication activities, the characteristics of "green" to shape corporate image, win public trust and support, and bring more A series of public relations activities that are more convenient and competitive. According to the above definition, which of the following is green PR? ['A software company launched a green software that can be used without installation, and there will be no residual records left in the computer after removal, which is welcomed by many users.', 'A fast-food company launched a "plant a tree" publicity campaign and advocated reducing packaging to save resources, creating a good business environment and social atmosphere.', 'A residential neighborhood committee promotes waste classification and promotion in accordance with the requirements of the local government, organizes a waste classification knowledge contest in the neighborhood, and distributes garbage bags of different colors on the site for use by residents.', 'People\'s Network held the "2010 First Annual Low-Carbon China Annual Innovation Forum" with the theme of "Developing a Low-Carbon Economy and Leading the Green Trend", revealing the 2010 low-carbon China leaders, leading brands, ten innovative technology products Multiple awards.']