Physical Geography is the natural side of geography. Weather, rocks, soils, etc. Human is cities, roads, buildings, urbanization, etc.We humans affect physical geography by living. We build roads and buildings.
Our cities cause a heat island which is kind of a bubble of heat in urban areas. This is hotter than the surrounding cities. It can influence rain and climate downwind of the heat island.
We dump things chancing the soils. There are other ways, but this is a general start on some of the ways that human geography affects physical geography.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.