If I was the president I would explain how, without drastic changes, most species on earth will go extinct in the next 50 years and that humans could be one of

If I was the president I would explain how, without drastic changes, most species on earth will go extinct in the next 50 years and that humans could be one of them. Then I'd explain that we need to immediately change from fossil fuels. Then, only then, when negotiating with companies, governors, etc, we would get to the brass tacks of how, when, and what compromises could be need to make it happen. But we're both nobodies on a public forum arguing, why, oh why, should one start from a compromised position?