He died of 'natural causes'. [=he died because he was ill or old and not by being killed in an accident, battle, etc.]
She was adopted immediately after she was born and never knew her 'natural' [=(more commonly) 'birth'] parents.
a country rich in 'natural resources' [=a country that has many valuable plants, animals, minerals, etc.]
(..) any apple that has eaten up before. I Am Superman Supertramp, and your you are Supermanzana. You are flavorful san. You are so organic. So natural. You are the apple of my life. At the beginning of September, they received a call of the police, when the patrol car of highways A group of searchers (..)2007 Into the Wild