Highlighted as recent problem, so immediate action required. Global and local effects to stress huge nature of problem. Signals change of context from Greenpeace's actions in the past. Pattern of threes match and draw reader's attention - the three solutions match the three benefits. Question links vision to imagine.
Style is chatty, informal, collaborative - invites reader to identify with situation.
Change in pattern - begins with question instead of statement identifying problem. First three sentences all highlight uncertainty of situation. Invites reader to join in the secret known by Greenpeace, so reader is involved and identifies with those in the know and in the right. Deal with present and future. By now this has become a pejorative term.