The Solar System

    Have you ever spit gum out of the car window, thrown trash on the ground or plastic bags in the garbage?  Have you ever forgotten to recycle a plastic bottle or driven your own car when you could have carpooled?  With all of the pollution, littering, and people's total disregard for the environment, planet Earth will soon be unlivable.  The question is, if humans have to leave Earth, where will we go?