How are people affected by geography?

Geography affects our lives in several important ways: if you live in an area with rocky terrain like a mountain, you're not going to be able to much farming, so much of your food will have to be imported. Natural disasters like hurricanes and tornadoes are obviously highly destructive and could change your life forever in an instant. Also, natural barriers could prevent interaction with other communities, although this probably isn't true in too many areas now with the help of so many new methods of communication.