What are the human activities that cause the devastation of landforms?

Question

or simply how landforms?

Answer 1

This is a tough question because it is not clear what you mean by "landforms".  If you mean human activities that disturb the natural topographic lay of the land in a negative way, then any activity which radically alters the earth would be the answer to your question.  Such activities would include: strip mining, open pit mining, construction of roadways (and railways) through mountainous areas, landfill in coastal areas (just to name a few off the top of my head).  Is this what you were looking for?