This topic is basically just geography, and its effects of human life in US. By learning the geography, we can know what problems we have, and we can find ou the solution. I am going to talk about the basic characteristics of geography in US, and it affects the politics, laws, industries, and some others. The social science will be the connection of human life and geography. the purpose is to inform people the basic knowledge of geogrpahy, and then they can know the power of nature. human life is affected by geograph, but uman life is affecting nature too.