What if all people will die. If people will die, there will be no one to take care of weeds and other plants, which means that nature would grow bigger and bigger. The buildings will most likely collapse because no one will be there to stabilize them and take care not to rust. The animals will hunt each other. The whole planet would be cleaner and greener because if there are no people no one will pollute, no one will cut down trees, no one will destroy nature.
Domestic animals, used to be fed by humans, will either starve or be hunted and killed by other animals.
