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Arthur's Seat in Edinburgh. These are the remains of an ancient volcano - the rocks are igneous. The houses in the front have been made from stone found in Scottish rocks - natural materials. The modern building to the right will have been made from steel and concrete - both man-made. Mind you concrete is made using cement, a man-made material that is manufactured from limestone, a sedimentary rock - a natural material.
 
 

 

 

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