Green PR: Refers to the communication, communication and coordination work that the company carries out in advance to the public in order to avoid mistakes in environmental issues and cause damage to their public image. Which of the following belongs to green PR? ['A chemical company explains the environmental pollution caused by sewage discharge to local residents and compensates for economic losses.', 'A telecommunications company organized a "Promoting Green, Passing Love" charity SMS contest to raise funds for disaster relief.', "A manufacturing company adopts urban green space and suburban woodland, which improves the company's image and public recognition.", 'A food company pays attention to the plant landscape and greening work, and declares the title of "green plant area" to higher authorities.']