If I ruled the world

If I ruled the world, firstly, I would make the world peace. Nowaday, there are many wars in the world, especially in the middle east. And many terrorists in this world, it's not safe to live on the earth. So I would make the world no war, no terrorist, let everyone safe in the world. Secondly, I would let poeple use same money in the world. That's good for everyone. For example, if you want to go abroad to study, you needn't to change your money. It's convenient for our lives and the business in the world. Finally, I would let per person plant one tree every year. The environment is worse and worse now, so I want everyone plant one tree every year to make the world better. That's I would do if I ruled the world.