Right now, global warming is most affecting animals that live on the poles. Polar bears (north pole)are having a harder and harder time finding food because the ice sheets are melting. The same issue exists for the penguins...
Last time a stray planetoid the size of Mars smashed into Earth, it scattered our planet's young crust into space, where gravity glued those particles into the Moon. This time, it would be all hellfire and brimstone with no survivors left.
