The document discusses the use of social media for environmental public relations and advocacy. It provides examples of how organizations like Greenpeace, Sierra Club, EPA, and Edelman PR have leveraged social media platforms to further their environmental missions. Greenpeace used an impactful YouTube video campaign against Nestle that resulted in cutting ties with palm oil companies. Edelman helped Starbucks with a social media Earth Month campaign that increased brand favorability and engagement. In general, the document states that social media is a useful tool for environmental PR due to its ability to reach broad audiences cost-effectively and foster ongoing interaction.